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1 answer:
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Answer:
10x + 50 = 90; 4 hours
Step-by-step explanation:
Let
x -----> the number of hours
y ----> the total charge
we know that
The total charge is equal to the number of hours multiplied by the rate of $10 per hour plus a flat fee of $50
so
The linear equation that represent this problem is
For y=$90
substitute in the equation and solve for x
Subtract 50 both sides
Divide by 10 both sides
therefore
10x + 50 = 90; 4 hours