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pochemuha
3 years ago
9

Hi everyone I'm confused with this problem and was wondering if someone could help out and explain to me what the answer is and

why, thanks in advance :)

Mathematics
1 answer:
hjlf3 years ago
4 0
The answer is C i hope this helps 

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Multiply each equation by a constant that would help to eliminate the y terms.
Zinaida [17]

Answer:

Therefore the required resulting equation is

6x-15y=-63\\-15x+15y=90

6 x minus 15 y = negative 63.

Negative 15 x + 15 y = 90

Step-by-step explanation:

Given:

2x-5y=-21         ......................Equation ( 1 )

3x-3y=-18         ......................Equation ( 2 )

To Find:

Expression after multiplying to eliminate y term,

Solution:

So to eliminate 'y' term we need to multiply equation 1 by a constant 3 and equation 2 by a constant -5,  such that equations  becomes

3(2x-5y)=3\times -21\\\\6x-15y=-63 .....( 1 )

-5(3x-3y)=-5\times -18\\\\-15x+15y=90  .....( 2 )

so now by adding new equation one and two we can eliminate y term that means -15y and +15y will get cancel,

Therefore the required resulting equation is

6x-15y=-63\\-15x+15y=90

6 x minus 15 y = negative 63.

Negative 15 x + 15 y = 90

3 0
3 years ago
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The 7th grade class took a survey on their faviorte ice cream. 58 people said they perfer vanilla, while 28 people said they pef
Viktor [21]
Answer:
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Step-by-step explanation:
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3 years ago
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Tasya [4]

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Crazy boy [7]

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