SOLUTION: For his phone service David pays a monthly fee of $11 , and he pays an additional $0.04 per minute of use. The least he has been charged in a month is $68.40

Algebra ->  Inequalities -> SOLUTION: For his phone service David pays a monthly fee of $11 , and he pays an additional $0.04 per minute of use. The least he has been charged in a month is $68.40       Log On


   

Question 923649: For his phone service David pays a monthly fee of

$11
, and he pays an additional

$0.04
per minute of use. The least he has been charged in a month is

$68.40
.
What are the possible numbers of minutes he has used his phone in a month?
Use

m
for the number of minutes, and
solve your inequality for m
Found 2 solutions by ewatrrr, josmiceli:
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
$11 + $0.04x ≥ $68.40
x ≥ 57.40/.04
x ≥ 1435 minutes

Answer by josmiceli(19441) About Me  (Show Source):