Answer:
7 months
Explanation:
y =4x + 30
58 = 4x + 30
28 = 4x
x = 7
it will take 7 months.
y=4x+30
In 7 months, the total cost will be $58.
Since the monthly fee is 4, it's going to be the constant, or the slope. And 30 is a one time fee, so it's the y-intercept.
How many Months?
58-30=28
28/4=7
So in 7 months.
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