Each month, a shopkeeper spends 8 x plus 15 dollars on rent and electricity. if she spends 3 x minus 7 dollars on rent, how much does she spend on electricity? use pencil and paper. for which value(s) of x is the amount the shopkeeper spends on electricity less than $100? explain how you found the value(s).

x <  15.6

Step-by-step explanation:

She spends on rent and electricity

P(x) = 8x + 15

She spends on rent

Q(x) = 3x - 7

She spends on electricity

R(x) = P(x) - Q(x) = (8x + 15) - (3x - 7) = 5x + 22

R(x) = 5x + 22

If   R(x) < $ 100  we get

5x + 22 < 100

⇒  5x < 78

⇒  x <  15.6

fist on the left goes with the third on the right. second on the left goes with the fourth on the right. third on the left goes with the second on the right. the fourth on the left goes with first on the right

step-by-step explanation:

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