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Elena L [17]
3 years ago
5

Solving Systems of Equations by Substitution y=1/2x+5 y=-3/2x-7

Mathematics
1 answer:
DerKrebs [107]3 years ago
4 0
\left\{\begin{array}{ccc}y=\frac{1}{2}x+5\\y=-\frac{3}{2}x-7\end{array}\right\\\\subtitute:\\\\\frac{1}{2}x+5=-\frac{3}{2}x-7\ \ \ \ |subtract\ 5\ from\ both\ sides\\\\\frac{1}{2}x=-\frac{3}{2}x-12\ \ \ \ |add\ \frac{3}{2}x\ to\ both\ sides\\\\\frac{4}{2}x=-12\\\\2x=-12\ \ \ \ |divide\ both\ sides\ by\ 2\\\boxed{x=-6}\\\\subtitute\ value\ of\ "x"\ to\ first\ equation:\\\\y=\frac{1}{2}\cdot(-6)+5=-3+5=\boxed2\\\\Answer:\boxed{\boxed{x=-6\ and\ y=2}}
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Answer:

Step-by-step explanation:

Total amount of money that Marina saved from her babysitting job is $80.

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3 years ago
BRAINLIEST HELP.............
Rus_ich [418]

I think the answer should be b, since y=3 when x=0, according to the option B.

y = x + 3, B

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4 years ago
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5 batches because if 1/6 is 1 then 5/6 is 5
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3 years ago
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DerKrebs [107]
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so ur answer is 3 3/4 lbs of cheese in total
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4 years ago
Which of the following numbers would you multiply -3/4 by to equal 1? a.4/3 b.4 c.-4/3 d.3/4
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