Answer:
(- 2, - 3 )
Step-by-step explanation:
y = 3x + 3 → (1)
y = x - 1 → (2)
substitute y = 3x + 3 into (2)
3x + 3 = x - 1 ( subtract x from both sides )
2x + 3 = - 1 ( subtract 3 from both sides )
2x = - 4 ( divide both sides by 2 )
x = - 2
substitute x = - 2 into either of the 2 equations and evaluate for y
substituting into (2)
y = - 2 - 1 = - 3
solution is (- 2, - 3 )
Answer:
y = -3, x = -2
Step-by-step explanation:
1. Substitute "y = x - 1" in for y in the first equation:
x - 1 = 3x + 3
2. Isolate x:
x = 3x + 3 + 1
3. Combine like terms:
-2x = 4
4. Solve for x:
-2x/-2 = 4/-2
x = -2
5. Solve for y with substitution (using the second equation):
y = -2 - 1
y = -3
hope this helps!
Please do help with my math problem.
Answer:
y = (1/4)x + 20
Step-by-step explanation:
The general equation of a line is
y = mx+ b , where m is the slope of the line and b is the y-intercept of the line ( where the line intersects the vertical y-axis)
From the graph we can see that the line intersects the y-axis at 20, so our y- intercept is b = 20
Now will find the slope of the line, and for that we need any two points from the line.
For example let's pick points ( x1= 0, y1 = 20) and ( x2 = 4, y2 = 21)
the slope m = (y2-y1)/(x2-x1) = (21-20)/ (4-0) = 1/4
slope of the line is m = 1/4
The equation of the graph shown in the graph is
y = (1/4)x + 20
15. Ramesh sells hot dogs at a ball game. He earns $8.50/h, plus $0.35 for each hotdog he sells. a) How much will Ramesh earn in a 4-1 shift if he sells 52 hot dogs?
Answer:
$114.70
Step-by-step explanation:
96.50 for 9 hours
18.20 for hotdogs
You cut the board into two pieces: one of the pieces is 10 centimeters long and the other piece is 20 centimeters long. Which piece has the greatest diameter?
Answer:
The same
Step-by-step explanation:
length does not mean anything in terms of diameter
Struggling with this (Also hoping my school doesnt find this since they know some of us are using brainly)
Describe the change in the graph of the parabola f(x) when it transforms into g(x) = two thirdsf(x).
The parabola g(x) will open in the opposite direction of f(x), and the parabola will be narrower than f(x).
The parabola g(x) will open in the same direction of f(x), and the parabola will be narrower than f(x).
The parabola g(x) will open in the opposite direction of f(x), and the parabola will be wider than f(x).
The parabola g(x) will open in the same direction of f(x), and the parabola will be wider than f(x).
Answer:
(d) opens the same; wider
Step-by-step explanation:
Multiplying a function by a constant has the effect of vertically scaling the graph of the function by a factor equal to that constant.
__
Here, you're multiplying by 2/3, so each y-value is 2/3 of its previous distance from the x-axis. The effect on the graph of a parabola is to make it "flatter", hence wider in appearance. This does not change the direction in which it opens.
The attachment shows an example.
A cell phone company expects that every 2 out of 25 cell phones will have some form of defect. At this rate, how many cell phones out of 500 will be expected to have a defect?
Answer:
40 phones
Step-by-step explanation:
The company expects that every 2 out of 25 phones will have some form of defect.
In percentage terms, this is:= 2 / 25 * 100%= 8%If there are 500 phones therefore,
the defected phones would still be the same percentage and the actual number would be:= 8 % * 500= 40 phones
Instruction. Read the situation below and answer the following questions.
You have noticed that because of the pandemic, cycling became popular again
as it became one of the means of transportation for many especially those who
lost their jobs and it became a hobby for some. You became a fan of cycling due
to its influence, so you decided to build your own Mountain bike. You have many
choices to make. First, you must choose the color of your bike from 4 colors (red,
blue, orange, black), second is the seat either normal or with extra cushion and
the last is the handlebar if you want to have a straight one or a curve.
Using the fundamental counting principle, count the number of choices you have
in building your mountain bike?
Using the Fundamental Counting Theorem, it is found that you have 16 choices in building your bike.
What is the Fundamental Counting Theorem?It is a theorem that states that if there are n things, each with [tex]n_1, n_2, \cdots, n_n[/tex] ways to be done, each thing independent of the other, the number of ways they can be done is:
[tex]N = n_1 \times n_2 \times \cdots \times n_n[/tex]
In this problem:
For the color, there are 4 outcomes, hence [tex]n_1 = 4[/tex].For the seat, there are 2 outcomes, hence [tex]n_2 = 2[/tex].For the handebar, there are 2 outcomes, hence [tex]n_3 = 2[/tex].Thus, the total number of choices is given by:
N = 4 x 2 x 2 = 16.
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Can someone please solve this problem for me. I'm kind of confused-
This is probability too-
Step-by-step explanation:
(1)The probability of landing on the color gray ONCE
= 2/7
Since it is spun 35 times, the expected number of times that it lands on a gray will be
(2/7 × 35) = 10 times
(2)The probability of landing on the color black ONCE
= 1/7
Since it is spun 105 times, the expected number of times that it lands on a black will be
(⅐ × 105) = 15 times
The formula is:
Expected value = (Number of spinning)×(probability of landing on a colour)
State the degree and leading coefficient of each polynomial in one variable. If not a polynomial in one variable, explain why.
3x^4+6x^3-x^2+12
Answer:
Step-by-step explanation:
3x^4+6x^3-x^2+1...............
The surface area S of a cylinder is S = 2πr² + 2πrh where r is the base radius and h is the height. What is h, in inches, when S is 175 square inches and r is 6 inches?
Answer:
h = -1.356
Step-by-step explanation:
Remark
This is one of those questions where you could solve for h in the formula and then just put values in for all the other variables. Since you have posted this on Brainly, I'll just use the formula given and my last step will be one of division
Formula
S = 2 * pi * r^2 + 2 * pi * r * h Put the givens into the formula
Givens
S = 175 in^2
pi = 3.14
r = 6
h = ?
Solution
175 = 2 * 3.14 * 6^2 + 2 * 3.14 * 6 * h Combine
175 = 226.08 + 37.68*h Subtract 226.08 from both sides
175-226.08 = 37.68*h Combine
-51.08 = 37,68*h Divide by 37.68
h = - 51.08/37.68
h = -1.356
Comment
This is impossible. No value of measurement can be negative. But it is what you get when using the numbers given
7(8+4k)+12 = it for bigideas math
Answer:
28k+68 hope this helps!
Step-by-step explanation:
Answer:
68 + 28k
that is to simplify it to solve it is 4*(7k+17)
Freddy has a bag of jellybeans which has the following colors to purple one red or yellow three orange what is the probability that freddy will randomly selected purple jellybean eat it then select an orange jellybean
Answer:
Because there are 3 purple and only one orange...
what is the y-intercept of the line given by the equation y=8x +75?
Answer:
(0, 75)
Step-by-step explanation:
The y-intercept is the y-coordinate of a function when x is equal to 0. In other words, it is the point at which the function crosses the y-axis.
For the equation y = 8x + 75, you plug in x = 0 to get:
y = 8(0) + 75 = 75, meaning that y = 75 when x = 0.
This gives you the y-intercept (0, 75).
Angles 1 and 2 are complementary angles. The measure of angle 1 is 42 degrees, and the measure of angles 2 is (3x) degrees. Find the value of x.
Answer:
Step-by-step explanation: What grade math homework is this?
what is the answer to 3 x b?
Answer:
3b
Step-by-step explanation:
unless b stands for something it should be just that
What is the value of x?
Х
6
8
Answer:
10
Step-by-step explanation:
This is a right triangle. To find the hypotenuse in this right triangle, we can use the pythagorean theorem.
The Pythagorean Theorem states a^2+b^2=c^2.
In this case, we would plug this in and get 6^2+8^2=x^2
Solve, and get 100=x^2, x=10
A triangle with side lengths of 200 meters, 300 meters, and 250 meters is shown. a surveyor measures the lengths of the sides of a triangular plot of land. what is the measure of the angle of the triangular plot at which the surveyor stands? approximate to the nearest degree. cos–1(0.75) = 41° cos–1(0.125) = 83° cos–1(0.563) = 56° cos–1(0.15) = 89°
The angle of the triangular plot at which the surveyor stands is 83°
What is a triangle?A triangle is a shape with three sides and three angles. From the information given, the sides of the three angles are different, we can say the triangle is a scalene triangle since no sides are equal.
To determine the angle of the triangular plot at which the surveyor stands, we need to use the cosine formula.
Given that:
a = 300 mb = 250 mc = 200 mLet's assume that the angle at which the surveyor stands is ∠A, then:
[tex]\mathbf{a^2= b^2+c^2-2 bc \times Cos A}[/tex]
Making cos A the subject, we have:
[tex]\mathbf{cos \ A = \dfrac{ b^2+c^2-a^2}{2bc}}[/tex]
[tex]\mathbf{cos \ A = \dfrac{ 250^2+200^2-300^2}{2(250 \times 200)}}[/tex]
[tex]\mathbf{cos \ A = 0.125}[/tex]
A = cos⁻¹ (0.125) ≅ 83°
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Answer:
cos–1(0.125) = 83°
Step-by-step explanation:
Find the volume of the cylinder, round your answer to the nearest hundredth.
Answer:
V = 1207
Step-by-step explanation:
What is the area, in square inches, of the figure shown here?
A 15 in2
B 22 in2
C 24 in2
D 30 in2
A 4-column table with 4 rows titled Population Data. Column 1 has entries 4, 5, 9, 15. Column 2 has entries 8, 2, 20, 1. Column 3 has entries 6, 9, 10, 8. Column 4 has entries 10, 8, 1, 2.
If Serena selects 4 samples from the table, which row will give her largest mean?
Which row will give her the smallest mean?
The actual population mean will be between
Answer: Row 3
Row 2
6 and 10
Step-by-step explanation: C B A
ILL GIVE BRAINIEST FOR THE RIGHT ANSWER!!! PLS HELP
Answer:
Your answer would be 96vw^7/x
Step-by-step explanation:
0.96w^7v/x
I'm pretty sure this is the right anwser I hope this helps.
A shipping company charges $6 to ship a package that weighs up to 1 pound and $2 for each additional pound or portion of a pound. which equation represents the cost, in dollars, of shipping a package that weighs x pounds?
The equation is 6(2x-1), where X is more than 0. When a shipping company charges $6 to ship a package that weighs up to 1 pound.
What is the equation?
In algebra, an equation can be defined as a mathematical statement consisting of an equal symbol between two algebraic expressions that have the same value.
A shipping company charges $6 to ship a package that weighs up to 1 pound and $2 for each additional pound or portion of a pound.
lets make an assumption that the total weight of the shipment is x pound and cost for shipping is y.
the shipping company charges $6 for the first pound.
Up to now, the charge is y=6
After 1 pound, i.e for the remaining (x-1) pounds, they charge $2 per pound.
So, the total charge will be, y=6+2(x-1)
weight is always starting from zero as there is no negative weight.so X>0
so the equation is 6(2x-1), where X is more than 0
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MATH HELP AS SOON AS YOU CAN
Answer:
The green box
Step-by-step explanation:
1.26 > 1.026
This is because the tenths value of 1.26 is greater than the tenths value of 1.026.
Answer:
The green box would be your answer.
Step-by-step explanation:
When you look at the decimals place, the Red boxes decimal place has a 0 infront of the 26 making it a smaller decimal.
Mike draws five cards from a standard 52-card deck. What is the probability that he draws a card from at least three of the four suits
Answer:
not answered this question
need precalc help with work shown. i’ll give brainliest
Answer:
For 8, the answer is
i) (pi/3) + 2*(pi)*k, k is any integer
ii) -(pi/3) + 2*(pi)*k
Two angles are supplementary. If one measures 125°, what is the measure of the other
angle?
Answer:
55°
Step-by-Step Explanation:
Supplementary Angles means it adds up to 180°.
You can find the measure of the missing angle by doing 180°-125°=55°.
what does x equal
18 ÷ x = -2
-9
9
-6
-8
x=-9
Solution:18÷x=-2Multiply both sides by x18=-2x-2x=18Now, divide both sides by -2:x=-9Hope it helps.
Do comment if you have any query.
Answer:
The answer is -9
Step-by-step explanation:
I hope this helps!
18/-9=-2
What is the initial y-value of the function that models the relationship
between the points (3, 0) and (8, 35)
A: -21
B: -11
C: -3/7
D: -2/7
The solution is Option A.
The equation of line is y = 7x - 21 and the initial y value of the function is given by y = -21
What is an Equation of a line?
The equation of a line is expressed as y = mx + b where m is the slope and b is the y-intercept
And y - y₁ = m ( x - x₁ )
y = y-coordinate of second point
y₁ = y-coordinate of point one
m = slope
x = x-coordinate of second point
x₁ = x-coordinate of point one
The slope m = ( y₂ - y₁ ) / ( x₂ - x₁ )
Given data ,
Let the equation of line be represented as A
Now , the value of A is
Let the first point be P = P ( 3 , 0 )
Let the second point be Q = Q ( 8 , 35 )
Now , the slope of the line between the points is given by the formula
Slope m = ( y₂ - y₁ ) / ( x₂ - x₁ )
Substituting the values in the equation , we get
Slope m = ( 35 - 0 ) / ( 8 - 3 )
Slope m = 35/5
Slope m = 7
Now , the equation of line is given by the formula ,
y - y₁ = m ( x - x₁ )
Substituting the values in the equation , we get
y - 0 = 7 ( x - 3 )
y = 7x - 21
Now , the initial value of y is calculated when x = 0
So , substituting the value of x = 0 in the equation , we get
y = 7 ( 0 ) - 21
y = -21
Therefore , the initial value of y = -21
Hence , the equation of line is y = 7x - 21
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PLEASE HELP Evan earned a score of 610 on Exam A that had a mean of 650 and a standard deviation of 40. He is about to take Exam B that has a mean of 600 and a standard deviation of 50. How well must Evan score on Exam B in order to do equivalently well as he did on Exam A? Assume that scores on each exam are normally distributed.
Using z-scores, it is found that he must score 550 on Exam B order to do equivalently well as he did on Exam A.
What is the z-score formula?The z-score of a measure X of a distribution with mean [tex]\mu[/tex] and standard deviation [tex]\sigma[/tex] is given by:
[tex]Z = \frac{X - \mu}{\sigma}[/tex]
The z-score measures how many standard deviations the measure is above or below the mean.
For Exam A, we have that the parameters are [tex]X = 610, \mu = 650, \sigma = 40[/tex], hence his grade had a z-score given by:
[tex]Z = \frac{X - \mu}{\sigma}[/tex]
[tex]Z = \frac{610 - 650}{40}[/tex]
[tex]Z = -1[/tex]
In Exam B, with [tex]\mu = 600, \sigma = 50[/tex], we want the grade X with the same z-score of Z = -1, hence:
[tex]Z = \frac{X - \mu}{\sigma}[/tex]
[tex]-1 = \frac{X - 600}{50}[/tex]
X - 600 = -50
X = 550.
He must score 550 on Exam B order to do equivalently well as he did on Exam A.
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PLEASE HELP!! What could be the answer?
Answer:
c. 18[tex]\pi[/tex] cubic inches
Step-by-step explanation:
half sphere's volume:
[tex]V=\frac{2}{3} \pi r^{3}[/tex] r = 6/2 = 3 inches
[tex]V=\frac{2}{3} \pi (3)^{3} =\frac{2}{3}( 27\pi )=\frac{54}{3} \pi =18\pi[/tex]
Hope this helps
THIS IS A TEST NEED HELP!!
Each phrase in the table describes two variables which are strongly correlated. Select all phrases that imply correlation without causation.