Interpreting Parts of a Linear Equation

Talk time Phone Company charges $0.12 per minute of phone use plus a monthly service fee of $8.00 for its phone service.  Which equation below can be used to find c, the total cost for one month when m, minutes are used?

• c = 0.12m + 8m

• c = 8m + 0.12m

• c = 0.12m + 8

• c = 0.20m

The Roaming Cell Phone Company charges $15.00 per month plus $0.20 per minute of airtime usage.  If Juanita uses x minutes of airtime, what is an equation that can be used to determine her monthly cell phone bill (C)?

• C = 15 + 0.20x

• C =15 (0.20x)

• C = 15 + x + 0.20

• C = 0.20 + 15x

A rental company at Best Bargain Rental costs $150 a week, plus $0.10 per mile.  Which equation represents the relationship between the number of miles (x) and the total cost in dollars (y) for a 2- week period?

• y = 2(150)(0.10x)

• y = 2(150) + 0.10x

• y = 150 + 2(0.10x)

• y = 2(150 + 0.10x)

Jacob collects hats.  He has 6 hats already, and he collects 2 hats a week.    w = number of weeks, h = total hats

• h = 2w + 6

• h = 6w + 2

• h = 2w - 6

• h = 6w - 2

For lunch, Amanda had a hamburger and some potato chips. The hamburger totaled 325 calories and each chip had 12 calories. Write a liner equation to represent the situation.

• y = 12 + 325

• y = 12x  + 325

• y = 325 - 12x

• y = 325x + 12

Which equation shows the number of bottles left after x days?
A family buys a case of water with 48 bottles and drinks 5 bottles per day.

• y = 48x + 5

• y = -5 + 48x

• y = -5x - 48

• y = 48 - 5x

Please solve this equation

m - 14 = 32

• m = 18

• m = 2 ¹/₈

• m = 424

• None of these match my answer

Please solve this equation

23 = x + 7

• x = 16

• x = 30

• x = 161

• None of these match my answer

2) Solve this equation

t - 7 = 2

• t = 9

• t = 7

• t = 5

• None of these match my answer

Solve this equation

c - 1 = 8

• c = 9

• c = 7

• c = 8

• None of these match my answer