A cell phone company charges a flat rate of
$2.50 per month, with an additional charge
of $0.15 per minute. How many minutes
did Laura talk on her cell phone if her
monthly bill was $72.25?

465 minutes or 8 hours and 15 minutes

Step-by-step explanation:

her monthly bill was 72.25 and she has to pay 2.50 per month

72.25 - 2.50 = 69.75

69.75/ 0.15 = 645 minutes

645 minutes/ 60 minutes= 7.75 = 8 hours 15 minutes

$53.50

step-by-step explanation:

you have to subtract the amount of money chuck earned ($72.50) by the cost of the gas for the mower ($11.25) and the new string for the trimmer he bought ($7.75).

72.50-11.25=61.25

and then subtract $61.25 by the second thing he bought (the new string for the trimmer)

61.25-7.75=53.5

so in total it's $53.50 (53 dollars and 50 cents)