John matthew has $50 in his savings. each week he spends $4 on snacks during lunch. write the equation for this. y=mx+8

Matthew has $50 in his saving, and his saving = y, y = 50

He spends $4 (the m) on snacks each time

50 = 4x + 8

Isolate the x. Note the equal sign, what you do to one side, you do to the other. Do the opposite of PEMDAS.

First, subtract 8 from both sides

50 (-8) = 4x + 8 (-8)

42 = 4x

Divide 4 from both sides

(42)/4 = (4x)/4

x = (42)/4

x = 10.5

John Matthew buys 10 snacks (since he cannot buy 1/2 a snack)

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i believe it is c.y = 9x

rise over run. 9 units up over 1 unit right or 9/1

d i think

step-by-step explanation: