Unit Rate
A car travels 120 miles in 4 hours. What is the unit rate?
30 miles per hour
What is 25% of 40?
10
A figure is enlarged by a scale factor of 2. An original side is 5 cm. What is the new length?
10 cm
What formula is used to find the circumference of a circle?
C = πd or C=2πr
x + 7 = 15
x = 8
You buy 6 notebooks for $9. What is the cost per notebook?
$1.50 per notebook
What is 60% of 50?
30
A drawing uses a scale factor of 3. An original length is 4 inches. What is the new length?
12 inches
Find the circumference of a circle with a diameter of 10 cm.
30 cm
Solve: x − 9 = 12
x = 21
A runner jogs 15 miles in 3 hours. How many miles per hour does the runner jog?
5 miles per hour
15 is what percent of 60?
25%
A shape is reduced by a scale factor of ½. The original length is 16 cm. What is the new length?
8 cm
What formula is used to find the area of a circle?
A = πr²
Solve: 4x = 28
x = 7
A factory makes 450 items in 9 hours. How many items per hour are made?
50 items per hour
A shirt costs $80 and is discounted 20%. How much is the discount?
$16
A map uses a scale of 1 inch = 20 miles. How far is 3 inches on the map?
60 miles
Find the area of a circle with a diameter of 12 cm.
108 cm
Solve: x ÷ 5 = 6
x = 30
The better buy: $8 for 4 pens or $15 for 10 pens
$15 for 10 pens
A test has 40 questions. You answered 85% correctly. How many questions did you get right?
34 questions
A model car is made using a scale factor of ¼. The real car is 16 feet long. How long is the model?
4 feet
A circle has a circumference of 90 ft. Find the radius.
15 ft
Solve: −3x = 18
x = −6