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CaHeK987 [17]
3 years ago
9

— 3х + Зу = 9 2x – 7y = - 14

Mathematics
1 answer:
pshichka [43]3 years ago
7 0

Answer: A! x=-1 2/5, y= 1 3/5

Step-by-step explanation:

First put -3x+3y=9 into slope-intercept form(y=mx+b)

3y=-3x+9

then solve for y

y=-1x+3

enter your y-intercept into the equation below..

2x-7(-1x+3)=-14

2x+7x-21=-14

2x+7x=-14+21(when changing sides it changes signs that's why 21 is now a positive)

2x-7x=7

-5x=7 divide -5 into 7

7/5

x=-1 and 2/5

then input x back into the first equation

-3(7/-5)+3y=9

21/5+3y=9

3y=9-21/5

3y=24/5

divide 3 into 24/5

=24/15=1 and 9/15 reduce it anddd

y=1 and 3/5

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The volume of the box is 3/4 cubic meters.

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8 0
3 years ago
Read 2 more answers
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Answer:

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Step-by-step explanation:

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