Question

Call Wireless phone company charges $0.50 for the first call you make and $0.10 for each additional minute. The cost of a phone call can be expressed by the formula C = 0.50 + 0.10(m – 1), where C is the total cost in dollars and m is the number of minutes that you talk. If the bill for your phone call was $1.90, how long did you talk?

Answer 1

The easiest thing is to plug in $1.90. Your equation should look like this: 1.9=.5+.1(m-1), so we're trying to solve for m. Next, subtract .5 from both sides. Now you should have this: 1.4=.1(m-1). Then, divide by .1 on both sides. Now it looks like this: 14=m-1. Add 1 to both sides and you get m=15. Your call was 15 minutes.

Answer 2

thank you

Answer 3

I have and other question.

Answer 4

The cost to repair Linda's car is $500, including parts and labor. The cost of parts is $140. If the cost of labor is $40 per hour, how many hours of labor did the repairs take?

Answer 5

here are the answer choices.
A.20
B.1
C.8
D.9

Answer 6

The total cost is 500, so that's your y. The parts are 140, so that's your y-intercept. You should set up an equation that looks like this: 500=40x+140. First, subtract 140 from both sides to get 360=40x. Then, divide both sides by 40. That gives you x=9, so they worked 9 hours on the car.