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nexus9112 [7]
3 years ago
15

Can someone know 7 8 and 9

Mathematics
1 answer:
frez [133]3 years ago
5 0

<em>7)</em> they give you the variable of Y


y= -3x

plug that y into the first equation

-3x + -3x = 30

add the two terms since they're like terms

-6x = 30

to find x you need to divide 30 by -6

x = -5

<em>8)  </em>it s A

$8.50 per hour is the same as 8.50x and plus the commission. I guess D can be correct but I think they want to keep it in order since they gave  Greg's equation first then Kevin's

<em>9) </em>same thing the y is given to you. Plus in that to the first equation. cobine like terms and find X


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