Question

slo also has cell phone service from Varisoon Wireless. She pays a flat fee of $39.95for 350 minutes per month. Any minutes over 350 are at an additional cost. In November,Noslo's bill for wireless service was $108.70 for 475 minutes. What is the charge perminute for the minutes over 350 per month?

Answer 1

hello

Noslo spent 475minutes on call for that month, but we already know the price on the first 350 minutes

if Noslo is charged $39.95 for 350 minutes, we can subtract $39.95 from $108.70 and also 475 from 350 to know the cost and number of minutes respectively.

the number of minutes is

`475-350=125\text{ minutes}`

the cost of the minutes is

`108.70-39.95=68.75`

so, what this information implies is thar Noslo was charged $68.75 for 125 minutes.

we can easily find how much he's charged per minute from here.

let's make x represent that

`\begin{gathered} 125=68.75 \\ 1=x \\ \text{cross multiply both sides} \\ x*125=68.75 \\ 125x=68.75 \\ \text{divide both sides by the coefficient of x} \\ (125x)/(125)=(68.75)/(125) \\ x=0.55 \end{gathered}`

from the calculations above, Nsolo was charged $0.55 per minute