![\bf \begin{cases} -7x+8y=1\\ 4x-8y=20 \end{cases}\qquad \qquad \stackrel{\textit{using elimination}}{ \begin{array}{llll} -7x~~\begin{matrix} +8y \\[-0.7em]\cline{1-1}\\[-5pt]\end{matrix}~~=1\\ ~~4x~~\begin{matrix} -8y \\[-0.7em]\cline{1-1}\\[-5pt]\end{matrix}~~=20\\ \cline{1-1}\\ -3x~\hfill =21 \end{array}}](/tpl/images/0098/7666/7ebda.png)
4x – 8y = 20
what is the y-coordinate of the solution for this system?
Mathematics, 17.07.2019 04:10 guazet7650
–7x + 8y = 1
4x – 8y = 20
what is the y-coordinate of the solution for this system?
a. –1
b. –6
c. 1
d. 6
, i got 7 but thats not one of the answers
Answers: 2
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You know the right answer?
–7x + 8y = 1
4x – 8y = 20
what is the y-coordinate of the solution for this system?
4x – 8y = 20
what is the y-coordinate of the solution for this system?
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