1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Zielflug [23.3K]
3 years ago
8

X=-4y 3x+2y=20 Substitution

Mathematics
2 answers:
nadezda [96]3 years ago
7 0

Answer: y= -2; x = 8

Step-by-step explanation:

X=-4y.......equation 1

3x+2y=20......equation 2

Substitute the value of x into equation 2

3 (-4y) + 2y = 20

-12y + 2y = 20

-10y = 20

Divide both sides by -10

y = 20/-10

y = -2

Substitute the value of y into equation 1 to get the value of x

x = - 4(-2)

x = 8

I hope this helps greatly, please mark as brainliest answer.

inysia [295]3 years ago
6 0

Answer:

y=-2

x=8

Step-by-step explanation:

Substitute x=-4y into the other equation:

3(-4y)+2y =20

Multiply out the parenthesis:

-12y +2y = 20

-10y =20

Divide on both sides by -10:

y = 20/-10 =-2

Now, knowing y,you can substite it in the previous equation for x:

x = -4(-2)= 8

You might be interested in
This weekend Vanessa made 4 times as many batches as last weekend. She made a total of 25 batches for the two weekends. Determin
MissTica

Answer: The number of batches made by Vanessa  last weekend = 5

Number of batches made this weekend =20

Step-by-step explanation:

Let x be the number of batches made y Vanessa  last weekend.

Given : This weekend Vanessa made 4 times as many batches as last weekend.

i.e. Number of batches made this weekend = 4x

She made a total of 25 batches for the two weekends.

i.e. x+4x=25

\Rightarrow\ 5x=25

Divide both sides by 5 , we get

x=5

i.e. number of batches made y Vanessa  last weekend = 5

Number of batches made this weekend =20

Hence, the number of batches made by Vanessa  last weekend = 5

Number of batches made this weekend =20

7 0
2 years ago
Boxes that are 12 inches tall are being stacked next to boxes that are 18 inches tall. What is the shortest height qt which the
motikmotik

Answer:

The shortest height is 36 inches

Step-by-step explanation:

Here in this question, we want to know the shortest height with which boxes of 12 inches tall staked will be the same height with which boxes of 18 inches staked beside it

This is a question that has to do with multiples; In other words, we are simply looking for the lowest common multiple of 12 and 18;

The multiples of both are as follows;

12 - 12, 24,36,48,60•••••

18-18,36,54,72••••••

We can see that at the point 36, both have their first multiple match

So we can say that the lowest common multiple of 18 and 12 is 36

3 0
3 years ago
Any help would be appreciated! :)
ikadub [295]

Answer:

-7, then -13, then -19

Step-by-step explanation:

Plug in x values to get y.

y = -2(0) - 7

y = 0 - 7

y = -7

y = -2(3) - 7

y = -6 - 7

y = -13

y = -2(6) - 7

y = -12 - 7

y = -19

Hope this helps. :0)

7 0
2 years ago
Read 2 more answers
Which set of steps shows the solution to the equation 3y = -9?
Lisa [10]

Answer:

see below

Step-by-step explanation:

3y = -9

Divide each side by 3

3y/3 = -9/3

y = -3

8 0
3 years ago
Read 2 more answers
Given real numbers a,b > 1.
irina [24]

Answer:

FALSE

Step-by-step explanation:

Recall that a function f(x) is of exponential order c, if there exists a constant M such that and a real r such that

|f(x)|\leq Me^{cx}\;(x\geq r)

Now, take a = 2.5 and b = 2

The functions

f(x)=(2.5)^x\;g(x)=2^x

are both exponential of order 1, since  

\lim_{x \to \infty}\frac{f(x)}{e^x}=\lim_{x \to \infty}\frac{g(x)}{e^x}=0

but a>b

8 0
3 years ago
Other questions:
  • Solve the quadratic by factoring 2X²-2X-12=0
    15·2 answers
  • How many apples can get to 100
    15·2 answers
  • Which ratio is equivalent to 3:7?<br> A 6:7<br> B 3:21<br> C 24:56<br> D 15:30
    7·2 answers
  • What is one formula for calculating the surface area of a rectangular prism
    10·1 answer
  • What should i write for a proportion 6:15 = n:35.
    11·1 answer
  • Help me pls, i need it!!
    10·1 answer
  • 5. What is the volume of the pyramid? *
    7·1 answer
  • The perimeter of a rectangle is 36m. If the length is 12m, what is the area?
    10·1 answer
  • I NEED HELP ASAP PLEASE THIS IS DUE IN AN HOUR
    11·2 answers
  • Which fraction is equal to 3 2/5? <br> 10/5<br><br> 17/5<br><br> 30/5<br><br> 32/5
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!