Solve Real World Problems with Rational Numbers

Aliyah had $24 to spend on seven pencils. After buying them she had $10. How much did each pencil cost?

• 24-10=7x

• 7x- 24=10

• 7x+ 10=24

• 10+x=14

Solve for x 

• x = 15

• x = 11

• x = 1/11

• x = 20

• A

• B

• C

• D

• A

• B

• C

• D

A large aquarium of water is being filled with a hose. Due to a problem, the sensor does not start working until some time into the filling process. The sensor starts its recording at the time zero minutes. The sensor initially detects the tank has 225 liters of water in it. The hose fills the aquarium at a constant rate of 15 liters per minute. What will the sensor read at the time 5 minutes?

• 150

• -300

• 300

• -150

Landon walks up to a tank of water that can hold up to 10 gallons. When Landon first sees the tank it contains 7 gallons. After 3 minutes the level is 5 gallons. How many minutes BEFORE Landon arrived was the tank completely full?

• A

• B

• C

• D

• E

Each month Chuck’s phone company charges a flat fee of $12 plus $0.05 per minute. His bill for last month was $18. How many minutes did Chuck talk on the phone last month?

• 120

• 100

• 350

• 600

Angelo has $5.50 for lunch. He guys a cookie for $1.05 and a drink for 1.45. How much money does Angelo have left?

• $2.50

• $3.00

• $1.25

• $4.00

Devon had his two friends over for pizza. Devon ate 1/4 of the pizza. One of his friends ate 3/8 of the pizza and the other friend ate 1/8 of the pizza. How much of the pizza is left?

• 1/4

• 1/8

• 1/3

• 1/5