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

answer: 60

step-by-step explanation:

1/2a + (2/3×30)   = 50

1/2a + 20 = 50

1/2a = 30

a = 60

so firstly, we need to isolate the y variables to be able to solve these inequalities. firstly, add 0.5x on both sides of the first inequality and subtract 1.5x on both sides of the second inequality:

now since the slope is positive for the first inequality, this means that the line going upwards belongs to the first inequality, and the line going downwards belongs to the second inequality.

next, since y ≥ in the first inequality, this means that the shaded region will be above the first inequality's line, thus shading regions a and b.

next, since y ≤ in the second inequality, this means that the shaded region is going to be below this line, thus shading regions a and c.

since both lines shade region a, this means that region a is the solution.

step-by-step explanation:

mark brainliest!