Answer:
rational function is:
f(x) = (x² - 4x - 5) / (x - 9)
To find f(5), we substitute x = 5:
f(5) = (5² - 4(5) - 5) / (5 - 9) = (-10) / (-4) = 5/2
To find f(9), we substitute x = 9:
f(9) = (9² - 4(9) - 5) / (9 - 9) = undefined
The function value f(9) is undefined because the denominator becomes zero, which makes the expression undefined.
To find f(7), we substitute x = 7:
f(7) = (7² - 4(7) - 5) / (7 - 9) = (-10) / (-2) = 5
Therefore, the function values are:
f(5) = 5/2
f(9) = undefined
f(7) = 5
Find the value of x.
Answer:
x = 8°
Step-by-step explanation:
∠GJL = ∠WJZ = 90° - 18° = 72° (cross angles)
(9x)° = 72° / : 9
x = 8°
Answer:
x = 8
Step-by-step explanation:
Find the measure of angle WJZ.
Since angles on a straight line sum to 180°:
⇒ m∠GJH + m∠HJW + m∠WJZ = 180°
⇒ 90° + 18° + m∠WJZ = 180°
⇒ 108° + m∠WJZ = 180°
⇒ 108° + m∠WJZ - 108° = 180° - 108°
⇒ m∠WJZ = 72°
According to the Vertical Angles Theorem, when two straight lines intersect, the opposite vertical angles are congruent.
Since line GJZ and line LJW intersect, then ∠GJL and ∠WJZ are vertical angles and therefore congruent:
⇒ m∠GJL = m∠WJZ
⇒ (9x)° = 72°
⇒ 9x = 72
⇒ 9x ÷ 9 = 72 ÷ 9
⇒ x = 8
Therefore, the value of x is 8.
Mr smith makes $20 and hour
working full time. He gets about 25% of his income taken out for taxes. He came up with the following monthly budget:
How much extra money does he have left over monthly to put into savings?
Please enter your answer without a dollar sign or spaces.
Amount of money that he have left over monthly to put into savings is $585.
What is Subtraction?Subtraction can be done for any numbers or algebraic expressions. It is the process of taking out certain value from a given amount of number.
The process of subtraction can also be termed as finding difference.
Given that,
Hourly rate of Mr. Smith = $20
If he works full time, then the number of working hours in a week is 40 hours.
So the number of working hours in a month = 40 × 4 = 160 hours
Rate for a month = 160 × $20 = $3200
Tax percent from the income = 25%
Income after tax = 3200 - (25% × 3200) = 3200 - 800 = $2400
Total budget of Mr. Smith = $1,410 + $405 = $1815
Income after the monthly budget = $2400 - $1815 = $585
Hence the money that is left is $585 for the savings.
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The complete question is given below :
Mr. Smith makes $20 an hour working full time. He gets about 25% of his income taken out for taxes. He came up with the following monthly budget.
Household:
Rent: $700
Cable: $85
Cell Phone: $175
Electric: $100
Food: $350
Total: 1,410
Automobile
Car: $200
Car Insurance: $100
Gas: $90
Maintenance: $15
Total: $405
How much money does he have left over monthly to put into savings?
PLEASE HELP ASAP
(Perimeter and Area on the Coordinate Plane MC) Which of the following is the fourth vertex needed to create a rectangle with vertices located at (–5, 3), (–5, –7), and (5, –7)? (5, –3) (5, 3) (–5, 7) (–5, –3)
Step-by-step explanation:
To create a rectangle with vertices located at (-5, 3), (-5, -7), and (5, -7), we need to find the fourth vertex that completes the rectangle. Since opposite sides of a rectangle are parallel and congruent, we can determine the missing vertex by finding the midpoint of either of the two given sides and then moving in the direction perpendicular to that side by the length of the other side.
The given sides are:
Side 1: (-5, 3) to (-5, -7), which has length 3 - (-7) = 10
Side 2: (-5, -7) to (5, -7), which has length 5 - (-5) = 10
Since the sides are congruent, we can find the midpoint of Side 1 as:
Midpoint of Side 1 = [(-5 + (-5))/2, (3 + (-7))/2] = [-5, -2]
To find the missing vertex, we need to move from (-5, -2) in the direction perpendicular to Side 1 by a distance of 10 units (the length of Side 2). Since Side 2 is horizontal, we need to move vertically. We can do this by adding or subtracting 10 from the y-coordinate of the midpoint of Side 1, depending on whether we want to move up or down. In this case, we want to move down, so we subtract 10:
Missing vertex = [-5, -2 - 10] = [-5, -12]
Therefore, the fourth vertex needed to create a rectangle with vertices located at (-5, 3), (-5, -7), and (5, -7) is (-5, -12).
Marta simplified this expression.
4 logs x+logs 2x log, 3x
In which step did she incorrectly apply a property of logarithms?
Answer:
step 1
Step-by-step explanation:
You want to know which step in Marta's simplification of 4·log₅(x) +log₅(2x) -log₅(3x) contains an error in application of properties of logarithms.
Properties of logslog(a^b) = b·log(a)
log(ab) = log(a) +log(b)
log(a/b) = log(a) -log(b)
Simplification[tex]4\log_5(x)+\log_5(2x)-\log_5(3x)\\\\=\log_5(x^4)+\log_5(2x)-\log_5(3x)\qquad\text{Step 1. Mistake: $4x$ instead of $x^4$}\\\\\log_5(x^4\cdot2x)-\log_5(3x)=\log_5\left(\dfrac{2x^5}{3x}\right)\\\\=\boxed{\log_5\left(\dfrac{2x^4}{3}\right)}[/tex]
Determine the union of j and k.
j = {7, 14, 21, 28, 35,42}
k = {14,28, 42, 56, 70}
The union of J and K is: J ∪ K = {7, 14, 21, 28, 35, 42, 56, 70} . Note that 14, 28, and 42 are included in both sets, but we only include them once in the union.
What is a set ?
In mathematics, a set is a collection of distinct objects, called elements or members of the set. Sets are often denoted by curly braces {} enclosing the list of elements, separated by commas. For example, the set of natural numbers less than 5 can be written as {0, 1, 2, 3,
The union of two sets J and K, denoted by J ∪ K, is the set that contains all the elements that are in J or K, or in both.
In this case, J = {7, 14, 21, 28, 35, 42} and K = {14, 28, 42, 56, 70}. To find the union of J and K, we simply combine all the elements in both sets, removing any duplicates.
Therefore, the union of J and K is: J ∪ K = {7, 14, 21, 28, 35, 42, 56, 70}
Note that 14, 28, and 42 are included in both sets, but we only include them once in the union.
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Solve the following system of equations and show all work.
y = 2x2
y =-3x -1
Answer:
Step-by-step explanation:
Start by substituting the first equation into the second equation to eliminate y:
2x^2 = -3x - 1
Move all terms to one side:
2x^2 + 3x + 1 = 0
Factor the quadratic equation:
(2x + 1)(x + 1) = 0
Solve for x by setting each factor to zero:
2x + 1 = 0 or x + 1 = 0
x = -1/2 or x = -1
Plug in the values of x to find the corresponding values of y:
For x = -1/2:
y = 2(-1/2)^2 = 1/2
For x = -1:
y = 2(-1)^2 = 2
The solutions to the system are (-1/2, 1/2) and (-1, 2).
what are the answers to these questions?
a) dV/dt=?
b) dV/dt=?
c) dV/dt=?
The value of differentiation A) dV/dt = 2πrh(dr/dt) ,B) dV/dt = π(r²(dh/dt) , C) π(2rh(dr/dt) + r²(dh/dt))
What is a differentiation?A mathematical procedure called differentiation is used to determine the derivative of a function with respect to a variable. The rate at which one quantity changes in relation to another is determined using this method.
If we have a function f(x) = x2, for instance, its derivative f'(x) = 2x tells us how quickly the function changes in relation to x.
The following formula determines the volume V of a right circular cylinder with radius r and height h:
V = πr²h
The cylinder's radius is r in this instance, and its height is h.
When we change the formula's specified values, we obtain:
V = πr²h
= (12)(2) = 2 cubic metres.
As a result, the right circular cylinder has a 2 cubic unit volume.
Let's now think about how dv/dt and dr/dt relate when h is constant and r varies over time.
When we take into account time t and differentiate both sides of the formula V =πr²h, we obtain:
dV/dt = d(r²h)/dt
(r²)(dr/dt)(dh/dt) = dV/dt
h is a constant, hence dh/dt = 0.
Therefore,
dV/dt= ((2r)(dr/dt)(dh/dt)
= 2rh(dr/dt)
B)
Let's now think about how dv/dt and dh/dt relate when r is constant and h varies over time.
When we take into account time t and differentiate both sides of the formula V = r²πh, we obtain:
dV/dt equals d(r²h)/dt
r²(dh/dt) = dV/dt
As r is constant, dr/dt is equal to 0.
Therefore,
r2(dh/dt) = dV/dt
C)
Given that r and h are time-varying, let's look at the relationship between dv/dt, dh/dt, and dr/dt.
When we take into account time t and differentiate both sides of the formula V = r²πh, we obtain:
dV/dt equals d(r²h)/dt
dV/dt is equal to (r²)(dh/dt) + (r²)(dr/dt)
Therefore,
((2rh(dr/dt) + r2(dh/dt))
= dV/dt)
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Analyzing Errors
Detra and Trinh each wrote a rule to represent the relationship between input and output
values as shown in the graph below.
Output
14
12
10
8
6
2
Detra's Rule: Output = 3 x Input
How do you think Detra arrived at her
solution?
10 12 14
8
Input
Trinh's Rule: Output= Input + 3
How do you think Trinh arrived at her
solution?
Answer:
Detra's rule: Output = 3 x Input. This means that for every input value, the output value is three times greater. Detra likely arrived at this solution by noticing a pattern in the input-output values and determining that the output values were always three times greater than the input values.
Trinh's rule: Output = Input + 3. This means that for every input value, the output value is the input value plus three. Trinh likely arrived at this solution by noticing a pattern in the input-output values and determining that the output values were always three more than the input values.
Step-by-step explanation:
HELP ASAP 25 PONITS PLEASE
Answer:
The Markdown amount: $9.45
Sale price: $13.05
Step-by-step explanation:
Convert 42% to decimal, which is 0.42
a = p(w). (formula)
a=22.5(0.42). or 22.5 x 0.42
a = 9.45
22.50 - 9.45 = 13.05
How much would you need to deposit every month in an
account paying 6% per year to accumulate $1,000,000 by age 65
starting when you are 20 years old?
A circle with center O(4,2) contains the point A(1,6),
MIM
0(44)
Write a subtraction expression for each length OB and AB:
OBX-2 AB-y+h
A subtraction expression for each length OB and AB is [tex]OBX = \sqrt (x - 4)^2 + (y - 2)^2] + 2 \sqrt (1 - x)^2 + 16] - y.[/tex]
What is the property of circle?Let r be the radius of the circle. Then we have:
r = distance(O, B)
We can use the distance formula to find the distance between two points:
distance(P, Q) = √[(x2 - x1)² + (y2 - y1)²]
where P = (x1, y1) and Q = (x2, y2)
Substituting O = (4, 2) and B = (x, y), we get:
r = distance(O, B) = √[(x - 4)² + (y - 2)²]
Now, let's consider the subtraction expression:
OBX-2 AB-y+h
We can simplify this expression as follows:
[tex]OBX = r + 2 AB = \sqrt{[(x - 4)^2 + (y - 2)^2] } + \sqrt[2]{[(1 - x)^2 + (6 - y)^2]}[/tex]
We don't need to include the variables y and h in the expression since they were not defined in the problem. So the final subtraction expression for OBX is:
[tex]OBX = \sqrt{ [(x - 4)^2 + (y - 2)^2]} + \sqrt[2]{[(1 - x)^2 + 6]-y} .[/tex]
Therefore, the expression is OBX [tex]= \sqrt(x - 4)^2 + (y - 2)^2] + 2 \sqrt(1 - x)^2 + 16] - y.[/tex]
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Select the correct answer from the drop-down menu. The design for a two-tank system is shown. The inner tank must be surrounded by oxygen with a density of 0.0827 pounds per cubic foot. Diagram shows a small rectangular prism placed inside a large rectangular prism. Small prism has a length of 5 feet, a width of 4 feet, and a height of 3 feet. Large prism has a length of 20 feet, a width of 8 feet, and a height of 6 feet. What amount of oxygen is needed in the outer tank? To meet the density required, approximately pounds of oxygen is required.
Answer:
74.43 pounds
Step-by-step explanation:
To find the amount of oxygen needed in the outer tank, we need to first find the volume of the space between the two tanks. This space is a rectangular prism with length 20 feet, width 8 feet, and height 6 feet, but with a rectangular prism removed from the center. The removed prism has length 5 feet, width 4 feet, and height 3 feet.
The volume of the rectangular prism between the two tanks is:
V = (20 x 8 x 6) - (5 x 4 x 3)
V = 960 - 60
V = 900 cubic feet
To find the amount of oxygen needed to fill this space with a density of 0.0827 pounds per cubic foot, we can multiply the volume by the density:
m = V x d
m = 900 x 0.0827
m ≈ 74.43 pounds
Therefore, approximately 74.43 pounds of oxygen is required to meet the density requirement.
Answer: 74 pounds
Step-by-step explanation:
(20*8*6) - (5*4*3)
960-60
v=900 ft3
density=0.0827
mass=0.0827*900
Mass is 74 pounds
Find the volume of each solid shape. Round your answer to two decimal places. (Use 3.14 for pi)
The volume of each shape (A right triangular prism and the trapezoidal prism are):
126 ft³; and546 ft³ respectively.A right triangular prism is a three-dimensional shape that has a triangular base and three rectangular faces. It is a prism because its two bases are identical and parallel. The formula for finding the volume of a right triangular prism is V = (1/2) * base * height * length.
A trapezoidal prism is a three-dimensional shape with trapezoidal bases and four rectangular faces. It is also a prism because its two bases are identical and parallel. The formula for finding the volume of a trapezoidal prism is V = ((b1 + b2) / 2) * height * length, where b1 and b2 are the lengths of the two parallel sides of the trapezoidal base.
Recall that the formula for the volume of a trapezoidal prism is:
V = (1/2)h(b1+b2)L
where:
V is the volume of the prismh is the height of the trapezoidb1 and b2 are the lengths of the parallel bases of the trapezoidL is the length of the prism.Hence, substituting the given values, we have:
V = (1/2)(20 + 19)(7) 4
V = (1/2)(39)(7) 4
V = (273/2) 4
V = 546ft³
Therefore, the volume of the trapezoidal prism is 546ft³
2) Recall that the formula for the volume of a right triangular prism is:
V = (1/2) * b * h * L
Where:
b is the length of the base of the triangle
h is the height of the triangle
L is the length of the prism (the distance between the triangular faces)
The factor of (1/2) is included since the base of the prism is a triangle.
Given the forumla above:
b = 9ft
h = 7ft
L = 4ft
Plugging in the values given:
V = (1/2) * 9ft * 7ft * 4ft
V = 126ft³
Therefore, the volume of the right triangular prism is 126ft³
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Given that the probability of a student taking a physics class is 23, and the probability of a student taking a math class given that the student takes a physics class is 710, what is the probability of a student taking a math class and a physics class? Enter your answer as a fraction in simplest form.
The probability of a student taking a math class and a physics class is [tex]\frac{7}{15}[/tex].
What is probability?
To determine the possibility of an event, one might utilise probability as a technique. Only the probability of an event occurring can be determined using it. A scale where 1 denotes a specific occurrence and 0 signifies impossibility.
We are given that the probability of the student taking a physics class is [tex]\frac{2}{3}[/tex].
Also, it is given that the probability of a student taking a math class given that the student takes a physics class is [tex]\frac{7}{10}[/tex].
So, probability of a student taking a math class and a physics class is:
⇒ Probability = [tex]\frac{2}{3}[/tex] * [tex]\frac{7}{10}[/tex]
⇒ Probability = [tex]\frac{14}{30}[/tex]
⇒ Probability = [tex]\frac{7}{15}[/tex]
Hence, the probability of a student taking a math class and a physics class is [tex]\frac{7}{15}[/tex].
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A "Pick 3" lottery game involves drawing
3 numbered balls from separate bins
each containing balls labeled from 0 to 9.
So there are 1,000 possible selections in
total: 000, 001, 002, . . . , 998, 999.
Players can choose to play a "straight"
bet, where the player wins if they choose
all 3 digits in the correct order. Since
there are 1,000 possible selections, the
probability a player wins a straight bet is
1/1,000. The lottery pays $400 on a
successful $1 straight bet, so a player's
net gain if they win this bet is $399.
Let X represent a player's net gain on a
$1 straight bet.
Calculate the expected net gain E(X).
According to the question the expected net gain for a player on a $1 straight bet is -$0.60.
how to calculate expected value in probability?Simply multiply each value of the discrete random variable X by its probability and add the products to get the expected value, E(X), or mean. The formula is as follows: E (X) = ∑ x P (x)
The possible outcomes for X are winning with a probability of 1/1000 and net gain of $399, and losing with a probability of 999/1000 and net gain of -$1. Therefore, we can calculate the expected value of X as follows:
E(X) = (1/1000)($399) + (999/1000)(-$1)
E(X) = $0.399 - $0.999
E(X) = -$0.60
Therefore, the expected net gain for a player on a $1 straight bet is -$0.60. This means that, on average, a player will lose $0.60 for each $1 bet they place on this game.
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Answer:
-0.60
Step-by-step explanation:
Khan Academy
what is the similar between percent of markup and percent of discount
The two are similar because both use a percentage as a decimal to get a new price.
please help The triangle below is isosceles. Find the length of side x in simplest radical form with a rational denominator
Answer:
x = 3√2
Step-by-step explanation:
You want the length x of the hypotenuse of an isosceles right triangle with sides of length 3.
Isosceles right triangleThe two legs of an isosceles right triangle are congruent. The length of the hypotenuse can be found from the Pythagorean theorem:
x² = 3² +3²
x² = 3²·2
x = √(3²·2) = 3√2
The length of side x is 3√2.
__
Additional comment
A isosceles right triangle is one of two "special" right triangles. The ratios of its side lengths are 1 : 1 : √2. This tells you the hypotenuse is √2 times the side length, as we found above.
The other "special" right triangle is the 30°-60°-90° triangle. Its side lengths have the ratios 1 : √3 : 2. Both of these are seen often in algebra, trig, and geometry problems.
RSM a pharmisest has a 18 percent alcohol sulution and a 40 percent alcohol sulution how much of each must he use to make 10 leaters of 20 persent alcohol sulution
Answer:
To make 10 liters of 20% alcohol solution, RSM would need to use a combination of the 18% and 40% alcohol solutions. Let's call the amount of 18% solution used "x" and the amount of 40% solution used "y".
To set up the equation, we'll use the fact that the amount of pure alcohol in the final solution must be equal to 20% of the total volume.
So:
0.18x + 0.40y = 0.20(10)
Simplifying:
0.18x + 0.40y = 2
We have one equation with two unknowns, which means we need another equation. Fortunately, we know that RSM is making a total of 10 liters of solution. So:
x + y = 10
We now have two equations with two unknowns, which we can solve simultaneously. One way to do this is to solve one equation for one variable, then substitute that expression into the other equation, like so:
x = 10 - y (from the second equation)
0.18(10-y) + 0.40y = 2 (substituting into the first equation)
1.8 - 0.18y + 0.40y = 2
0.22y = 0.2
y = 0.91
So RSM would need to use approximately 0.91 liters (or 910 milliliters) of the 40% solution, and the rest (9.09 liters or 9090 milliliters) of the 18% solution, to make 10 liters of 20% alcohol solution.
The gas company charges a $16 monthly service fee and $0.6924 per hundred cubic feet of natural gas used during a month. Which equation best represents, y, the gas company's monthly charges in dollars for using x hundred cubic feet of natural gas?
The gas company would charge $154.48 for using 200 hundred cubic feet of natural gas during the month.
What is Algebraic expression ?
An algebraic expression is a mathematical phrase that can include numbers, variables, and mathematical operations, such as addition, subtraction, multiplication, and division.
The equation that represents the gas company's monthly charges in dollars for using x hundred cubic feet of natural gas is:
y = 0.6924x + 16
Where:
x is the number of hundred cubic feet of natural gas used during the month
0.6924 is the cost per hundred cubic feet of natural gas used
16 is the fixed monthly service fee charged by the gas company.
To calculate the monthly charges for a given amount of natural gas used, we can substitute the value of x into this equation and simplify. For example, if x = 200, then:
y = 0.6924(200) + 16
y = 138.48 + 16
y = 154.48
Therefore, the gas company would charge $154.48 for using 200 hundred cubic feet of natural gas during the month.
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At a Noodles & Company restaurant, the probability that a customer will order a nonalcoholic beverage is .53.
a. Find the probability that in a sample of 12 customers, none of the 12 will order a nonalcoholic beverage. (Round your answer to 4 decimal places.)
The prοbability that in a sample οf 12 custοmers, nοne οf the 12 will οrder a nοnalcοhοlic beverage is 0.0042.
What is Binοmial Prοbability?Binοmial prοbability is a type οf prοbability that deals with the number οf successes in a fixed number οf independent trials, where each trial has οnly twο pοssible οutcοmes, cοmmοnly referred tο as success οr failure. It is calculated using the binοmial prοbability fοrmula.
This is a binοmial prοbability prοblem, where the prοbability οf success (οrdering a nοnalcοhοlic beverage) is 0.53, and the number οf trials is 12.
The prοbability οf nο custοmers οrdering a nοn-alcοhοlic beverage can be fοund using the binοmial prοbability fοrmula:
[tex]P(X = k) = (n choose k) * p^k * (1-p)^{(n-k)[/tex]
where:
n = number of trials
k = number of successes (in this case, 0)
p = probability of success (ordering a non-alcoholic beverage)
Plugging in the values, we get:
[tex]P(X = 0) = (12 choose 0) * 0.53^0 * (1 - 0.53)^{(12 - 0)[/tex]
[tex]= 1 * 1 * 0.47^{12}[/tex]
= 0.0042 (rounded to 4 decimal places)
Therefοre, the prοbability that in a sample οf 12 custοmers, nοne οf the 12 will οrder a nοnalcοhοlic beverage is 0.0042.
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please and thank you i really need it
Answer:
B
Step-by-step explanation:
What value of x satisfies the system of equations below? x + y = 2 7x - y = 2
Answer:
0.5
Step-by-step explanation:
We want to get an equation with only one variable for it to be able to be solved.
To do this, we will solve the first equation for y.
[tex]x+y=2\\y=2-x[/tex]
Now, we can plug this value of y into the second equation
[tex]7x-y=2\\7x-(2-x)=2\\[/tex]
Finally, we have just one variable, and we can solve for x.
[tex]7x-(2-x)=2\\7x-2+x=2\\8x=4\\x=0.5[/tex]
Question 5 of 12
Question 1-5
The side lengths of the figure below are given in centimeters.
0 00
Submit Test
If the perimeter of this figure is 33 cm, what is the value of x?
9
03
-9
-3
< Previous
2x-3
A
2022-2023 Algebra ICBA 8
12
Pause Test
The value of x is approximately 4.83 centimeters.
Answer: B (03)
The value of x, we need to add up all the side lengths of the figure and set it equal to the given perimeter of 33 cm.
The top and bottom sides have length [tex]2x-3[/tex] cm each, and the left and right sides have length [tex]x+5 cm[/tex] each.
So, we can write the equation:
[tex]2(2x-3) + 2(x+5) = 33 [/tex]
Simplifying and solving for x:
[tex]4x - 6 + 2x + 10 = 33 [/tex]
[tex]6x + 4 = 33 [/tex]
[tex]6x = 29 [/tex]
[tex]x = 29/6 [/tex]
[tex]x ≈ 4.83 [/tex]
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Chicken costs c dollars per pound. Write an expression for the price of 3/4 pound of chicken.
Answer: [tex]\frac{3}{4}[/tex]c
Step-by-step explanation:
If one pound of chicken costs c dollars, and we are writing an expression for 3/4 a pound of chicken, our expression will be the price (c) multiplied by how much chicken there is (3/4):
3/4c
- In mathematics, an expression is a combination of numbers, variables (represented by letters), symbols, and operators, arranged in a way that represents some meaningful mathematical relationship or calculation.
- Expressions can be simple, like 3x or 4 + 5, or complex, like (3x + 4y) / (2x - 5y). Expressions are not equations or inequalities, as they do not contain an equal sign, but they can be used to build equations or inequalities.
Solving the Question:The price of 1 pound of chicken is c dollars. To find the price of 3/4 pound of chicken, we can multiply the price of 1 pound by 3/4:
[tex]\begin{aligned}\sf Price\: of\: \dfrac{3}{4}\: pound\: of\: chicken& =\sf \dfrac{3}{4} \times c \\&=\boxed{\bold{\:\dfrac{3}{4}c\:}}\end{aligned}[/tex]
Therefore, the expression for the price of 3/4 pound of chicken is 3/4c.
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https://brainly.com/question/13667588What is the standard form of the equation of a quadratic function with roots of 4 and −1 that passes through (1, −9)?
y = 1.5x2 − 4.5x − 6
y = 1.5x2 − 4.5x + 6
y = −1.5x2 − 4.5x − 6
y = −1.5x2 − 4.5x + 6
Answer:
(a) y = 1.5x² -4.5x -6
Step-by-step explanation:
You want the standard form of the quadratic with roots 4 and -1, and passing through the point (1, -9).
CoefficientsFor roots p and q, the standard form can be found from the factored form:
(x -p)(x -q) = x² -(p+q)x +pq
For the given roots, the product pq will be ...
(4)(-1) = -4
The sum p+q is 4+(-1) = 3. The x-coefficient is the opposite of this.
The parent quadratic (before vertical scaling) will be ...
(x -4)(x +1) = x² -3x -4
The coefficients of the last two terms have the same sign. (Eliminates the 2nd and 4th answer choices.)
Leading coefficientThe given point has an x-value (1) between the given roots (-1, 4):
-1 < 1 < 4
The y-value at that point is negative. This means the vertex of the parabola will be below the x-axis, so the parabola opens upward and the leading coefficient is positive. (Eliminates the last two answer choices.)
The answer choices tell us the leading coefficient is 1.5, so the equation is ...
y = 1.5(x² -3x -4)
y = 1.5x² -4.5x -6 . . . . . . matches the first choice
__
Additional comment
We could find the value of the leading coefficient 'a' by evaluating ...
y = a(x -4)(x +1)
for x = 1. We would get ...
-9 = a(1 -4)(1 +1) = -6a ⇒ a = -9/-6 = 1.5
As we saw above, this isn't necessary. We only need to know that its sign is positive. The answer choices tell us the value.
If the x-value of the given point is not between the roots, then we know the sign of the y-value is the sign of the leading coefficient.
For multiple-choice questions, you only need to work enough of the problem to determine which answer choice is correct. You don't necessarily need to work the problem all the way to an answer.
See the problem in the image.
Are the two triangles similar?
Answer:
Yes the Triangle are similar by A.A.A Axiom
Answer:
yes, they two triangles are similar
Step-by-step explanation:
.........
5. 56 oz = ____lb ____oz
A. 2 lb 1 oz
B. 2 lb 3 oz
C. 2 lb 6 oz
D. 3 lb 8 oz
56 ounces is equal to 3 pounds and 8 ounces. So the answer is D: 3 lb 8 oz.
What is pound?Pound is a unit of measurement for mass or weight commonly used in the United States and the United Kingdom. The symbol for pound is "lb".
According to question:In the English system of measurement, there are 16 ounces in one pound. To convert a weight in ounces to pounds, we need to divide the number of ounces by 16.
In this case, we have 56 ounces. So, by dividing 56 by 16, we obtain:
56 / 16 = 3 with a remainder of 8
This means that 56 ounces is equal to 3 pounds and 8 ounces. So the answer is D: 3 lb 8 oz.
In the US customary system, one pound is equal to 16 ounces, while in the imperial system used in the UK, one pound is equal to 14 ounces.
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Convert 56 ounces(oz) into pounds(Ib)
56 oz = ____lb ____oz
A. 2 lb 1 oz
B. 2 lb 3 oz
C. 2 lb 6 oz
D. 3 lb 8 oz
Which might be a disadvantage to using equations for solving problems?
OA. It can be difficult to remember what an equation means without a
diagram, graph, or table.
B. They can be solved using algebra.
C. They cannot be solved if they have only one varible
Answer:
A disadvantage to using equations for solving problems might be that it can be difficult to remember what an equation means without a diagram, graph, or table (Option A).
Step-by-step explanation:
find the value of 9u+4 given that -5u-8=2
Answer:
13
Step-by-step explanation:
Given
7u - 4 = 3 ( add 4 to both sides )
7u = 7 ( divide both sides by 7 )
u = 1
Then
9u + 4 = 9(1) + 4 = 9 + 4 =13