Answers
H ;-)
x = -3 and y = -2
2x² - 5xy - y³ =
= 2 · (-3)² - 5 · (-3) · (-2) - (-2)³ =
= 2 · 9 - 30 - (-8) = 18 - 30 + 8 =
= -12 + 8 = -4
Answer:
[tex]2 {x}^{2} - 5xy - {y}^{3} \\ x = - 3 \\ y = - 2 \\ 2 { (- 3)}^{2} - 5 \times - 3 \times - 2 - { (- 2)}^{3} \\ 2 \times 9 + - 30 - - 8 \\ = 18 - 30 + 8 \\ = - 4 \\ thank \: you[/tex]
Related Questions
Is this a function? {(-3, 1), (1, -2), (3, 0), (4, 5)}
Answers
What is the length of a rectangle with width 12in. and area 66in.²?
Answers
Answer:
5.5 inches
Step-by-step explanation:
Because Length * Width = Area, Length * 12 = 66.
If we solve for Length by dividing both sides by 12, we end up with Length = 5.5 inches
Solve for x: the quantity of x plus 20 over 2 = 3x
Question 6 options:
x = 10
x = 4
x = −14
x = −17
Answers
Answer:
B. x = 4
Step-by-step explanation:
Answer: X = 4
Step-by-step explanation:
(x + 20)/2 = 3x
x + 20 = 2*3x
x + 20 = 6x
20 = 6x - x
20 = 5x
20/5 = x
x = 4
evaluate the impact of risky behaviour on your personal expectations in relation to your career help with maths too
Answers
Step-by-step explanation:
In triangle ADE:
sum of all angles is 180.
3x-10+58+42=180
3x+90=180
3x=180-90
3x=90
x=90/3
x=30
As line DA and CB are parallel:
angle D=angle C
angle y=58
In angle BCE, sum of angles is 180.
z+58+42=180
z+100=180
z=180-100
z=80
Write a rule for the geometric sequence with the given description. The first term is -3, and 5 is the previous term.
Answers
Answer:
The rule is (-3)(5)^(n-1).
Step-by-step explanation:
OK so the common ratio is 5 and first term = -3.
nth term = ar^(n-1)
= (-3)(5)^(n-1).
Suppose y varies directly with x, and y = 12 when x= - 4. Find x when y= 15.
Answers
Answer:x=-5
Step-by-step explanation:
Midpoints & endpoints
Answers
Answer:
The coordinates of A are (1, -4)
Step-by-step explanation:
The formula for finding a midpoint is ((x1 + x2) / 2, (y1 + y2) / 2)
However, in this problem, we're already given the midpoint. We're trying to find an endpoint. So, the equation changes into:
((x + 9) / 2 = 4, (y + 0) / 2 = -2)
For the x and y coordinates, multiply both sides by 2
(x + 9 = 8, y = -4)
(x = -1, y = -4)
Rewrite as coordinates.
(-1, -4)
14 +3n = 8n - 3(n - 4)
Answers
Answer:
n=1
Step-by-step explanation:
Start by distributing the -3 to (n-4)
14+3n=8n-3n+12
Then combine like terms on the right
14+3n=5n+12
Subtract 12 from both sides
2+3n=5n
Subtract 3n from both sides
2=2n
Divide both sides by 2
1=n
PLEASE HELP I WILL GIVE BRAINLIEST TO THE CORRECT ANSWER
himari is solving the equation 4 ( x - 3 ) = 16. Her first step is 4x - 12 = 16
which step could be the next step? select all that apply.
1. 4x - 12 + 12 = 16 + 12
2. 4x - 12 - (-12) = 16 - (-12)
3. 1/4 x ( 4x - 12 ) = 16 x (1/4)
4. 4x/4 - 12 = 16/4
5. 4 x ( 4x - 12 ) = 16 x 4
Answers
Answer:
1. could be the next step.
3. could be the next step.
Step-by-step explanation:
help its urgent please
Answers
Hi,
Answer is $0.19
Step-by-step explanation:-
We know that:-
15 dimes = $1.50
20 nickels = $1.00
8 quarters = $2.00
half dollar = $0.50
19 pennies = $0.19
Total = $5.19
Since Billy spended $5, so,
$5.19 - $5 = $0.19
Hope it helps you...
Which pair of transformations moves quadrilateral 1 to quadrilateral 2?
a:Reflect over the line y = -3, then rotate it 90 degrees counterclockwise about the origin
b:Reflect it over the x-axis, then rotate it 180 degrees about the origin
c:Rotate it 90 degrees counterclockwise about the point (-3, -3) then translate it 8 units to the right
d:Translate it 8 units to the right, then reflect it over the line y=-3
Answers
Answer:
Answer choices:
a. Reflection takes it to Q2, further rotation takes it back to Q3
Incorrectb. Reflection takes it to Q2, rotation takes to Q4 with right shape.
Correctc. Rotation takes is to Q4, translation keeps in same Q but with wrong shape
Incorrectd. Translation takes it to Q4, reflection keeps it in same Q but with wrong shape
IncorrectBecause the shape is present in Q3
So reflection over x axis takes it to Q2
Then 180° rotation about origin takes it to Q4
Hence Option B is correct
PLEASE ANSWER QUICK!
What does the 1/2 indicate in this equation?
y=1/2x+1
the y-intercept
the x-intercept
the slope
I don't know.
Answers
Compare to slope intercept form I e y=mx+b where m is slope and b is y intercept
here
m=1/2b=1Option C
if two planes intersect, then their intersection is a point true or false
Answers
I believe that it is true
Step-by-step explanation:
sorry if im wrong
Answer:
False.
Step-by-step explanation:
resolve into factors:- 49m² + 154m + 121
Answers
Answer:
4m^2 +154m +12149m^2 +( 77+77)m +121
49m^2 + 77m +77m +121
7m (7m +11) +11 (7m +11)
(7m+11) (7m+11)
hope it was helpful
Answer:
[tex](7m + 11 {)}^{2} [/tex]
Step-by-step explanation:
[tex]49 {m}^{2} + 154m + 121[/tex]
➡️ [tex] {7}^{2} {m}^{2} + 2 \times 7m \times 11 + {11}^{2} [/tex]
➡️ [tex](7 m{)}^{2} + 2 \times 7m \times 11 + {11}^{2} [/tex]
➡️ [tex] = (7m + 11 {)}^{2} [/tex] ✅
A dressmaker needs to cut 12-inch pieces of ribbon from rolls of ribbon that are 6 feet in length. How many 12-inch pieces can the dressmaker cut from 10 of these rolls of ribbon?
Before you try that problem, answer the question below.
How many inches of ribbon does the dressmaker have, in total?
Answers
Answer:
he can cut 60 strips or ribbon
Step-by-step explanation:
The dressmaker has 720 inches of ribbon
from each roll of ribbon, he can make 6 12-inch pieces or ribbon
she has 10 rolls
so 6(strips per roll) x 10(amount of rolls) = 60 strips :)
2. χΣ -4
Please help
Answers
Step-by-step explanation:
1)x is less than 7
2)x is greater than and equal to -4
HELPP MEEEEEEEEEEE PLSSSSSSSSSSSSSSS
Answers
Answer:
hmm looks like you are over thinking it its just 20-8
Step-by-step explanation:
solve for X: -0.6x>3
Answers
Answer:
x < -5
Step-by-step explanation:
-0.6x > 3
=> Dividing 0.6 on both sides
=> -x > 3/0.6
=> -x > 5
=> x < -5 [When we multiply -1 on both sides the sign changes]
The solution to the inequality -0.6x > 3 is x < -5.
To solve for x in the inequality -0.6x > 3, we need to isolate x on one side of the inequality.
First, to divide both sides of the inequality by -0.6 to remove the coefficient in front of x.
Remember that when dividing or multiplying both sides of an inequality by a negative number, we need to reverse the inequality sign.
So, dividing both sides by -0.6 gives
x < 3 / -0.6
Simplifying the right side of the inequality, we have:
x < -5
Therefore, the solution to the inequality -0.6x > 3 is x < -5.
Learn more about inequality ;
brainly.com/question/14164153
#SPJ6
Help (Geomotry)!!!!
Answers
x + 7 + 3x + 20 = 6x - 5
4x + 27 6x - 5
4x - 6x-27-5
-2x = -32
x = -32: (-2)
x = 16
Therefore
MN = 3x + 20 = 3 16+ 2048 + 20 = 68 Answer: MN = 68.
Some math help please?
Answers
Answer:
∠ LMP = 77° , ∠ NMP = 103°
Step-by-step explanation:
The 2 angles on the straight line sum to 180° , that is
∠ LMP + ∠ NMP = 180 , substitute values
- 16x + 13 - 20x + 23 = 180 , that is
- 36x + 36 = 180 ( subtract 36 from both sides )
- 36x = 144 ( divide both sides by - 36 )
x = - 4
Then
∠ LMP = - 16x + 13 = - 16(- 4) + 13 = 64 + 13 = 77°
∠ NMP = - 20x + 23 = - 20(- 4) + 23 = 80 + 23 = 103°
B
8
С
Find the length of "c" to the
nearest tenth using the
Pythagorean Theorem.
Enter
Answers
Answer:
10.6
Step-by-step explanation:
Pythagorean theorem: a² + b² = c²
Where a and b = the legs and c = hypotenuse
We are given two legs and need to find the hypotenuse
Given:
Short leg (a) = 7
Long leg (b) = 8
Hypotenuse = c
Now to find the value of c we simply plug in the values of the variables into the Pythagorean theorem and solve for c
Pythagorean theorem: a² + b² = c²
a = 7, b = 8, c = c
Plug in values
7² + 8² = c²
Now solve for c
Simplify exponents
49 + 64 = c²
Add
113 = c²
Taking the square root of both sides
c = 10.6 ( rounded to the nearest tenth )
Answer:
c = 10.6
Step-by-step explanation:
[tex]h {}^{2} = p {}^{2} + b {}^{2} \\ c {}^{2} = (8) {}^{2} + (7) {}^{2} \\ c = \sqrt{64 + 49} \\ c = \sqrt{113} \\c = 10.6[/tex]
Simplify (2^-1 +5^-1)^2 *(-5/8)^-2
Answers
Answer: 1.2544
Step-by-step explanation:
2^-1 = 1/2
5^-1 = 1/5
1/2+1/5 = 7/10
(7/10)^2=49/100=0.49
(-5/8)^-2 = 64/25=2.56
(2^-1 +5^-1)^2 *(-5/8)^-2 = 0.49 * 2.56 = 1.2544
Identify the perfect squares.
Select all that apply:
Answers
Answer:
81, 64, 49
Step-by-step explanation:
81/9=9
64/8=8
49/7=7
Solve - 3 [ ( x + 2 ) ( x - 1 ) - x ^ { 2 } + 1 ] + 3 ( x - 1 ) (and could you please explain it to me?? I really don't get it. Thanks!)
Answers
Answer:
Step-by-step explanation:
[tex](x+2)(x-1)= x^2+2x-x-2= x^2 +x -2\\\\( x + 2 ) ( x - 1 ) - x ^ { 2 } + 1 =x^2+x-2-x^2+1=x-1\\\\- 3 [ ( x + 2 ) ( x - 1 ) - x ^ { 2 } + 1 ] =-3(x-1)=-3x+3\\\\- 3 [ ( x + 2 ) ( x - 1 ) - x ^ { 2 } + 1 ] + 3 ( x - 1 ) =-3x+3+3x-3=6x\\[/tex]
my family uses 3 cartons of milk a day . how many cartons did we use in january
Answers
Answer:
93 cartons
Step-by-step explanation:
January-31
no of cartons-3 × 31=93
HELP WILL MARK AS BRAINLIEST!!!
MAGIC SQUARE HELP PLEASE
Answers
Answer:
Top Middle: 2/10 or 1/5 or 4/20
Bottom right: 2/20 or 1/10
Middle right: 2/10 or 1/5
Middle Middle: 7/40
Sarah is going on a trip. She drives for 2 hours and 50 minutes, rests for 30 minutes and drives
for another 1 hours 10 minutes.
What is her total travel time in hours and minutes
Answers
Answer:
4hr and 30 min
Step-by-step explanation:
2hr and 50 min + 30 min = 3hr and 20 min
3hr and 20 min + 1hr and 10min = 4 hr and 30min
Does 9, 10 and 15 equal a right triangle
Answers
Answer:
By virtue of The pythagorean theorem,in a right triangle squares of the similar two sides equal the square of The largest side.Only 9,12 and 15 fit this rule.
Step-by-step explanation:
Hope it help you If you have any questions can ask in the comments
Im bad at money :/ do please help me
Answers
The third answer
1 quarter, 6 dimes, 1 nickel, 7 pennies
Rearrange the formulae to make x the subject:
ay/x - dx= wx
Thanks in advance
Answers
Answer:
[tex] \frac{ay}{x} - dx = wx [/tex]
multiply x through out:
[tex]ay - {dx}^{2} = w {x}^{2} \\ {wx}^{2} + {dx}^{2} = ay[/tex]
factorise out x²:
[tex] {x}^{2} (w + d) = ay \\ {x}^{2} = \frac{ay}{w + d} [/tex]
take square root on both sides:
[tex] \sqrt{ {x}^{2} } = \sqrt{ \frac{ay}{w + d} } \\ \\ x = \sqrt{ \frac{ay}{w + d} } [/tex]
Step-by-step explanation:
the biggest obstacle is usually a division by x.
so, let's get rid of it by multiplying both sides of the equation by x
ay - dx² = wx²
then
ay = wx² + dx² = (w+d)x²
y = (w+d)x²/a = x² × (w+d)/a