A cell phone company charges a flat rate of $4.75 per month with a additional charge of $0.19 per minute how many minutes was Rachel on the phone if her bill was $27.55
Let's let the total number of minutes Rachel was on the phone be represented by x.
The total cost can be expressed as:
$4.75 (flat rate) + $0.19 (charge per minute) * x = $27.55
$4.75 + $0.19x = $27.55
$0.19x = $22.80
x = $22.80 / $0.19
x = 120
Rachel was on the phone for 120 minutes.