Unit 4 Review Nusinov

Unit 4 Review Nusinov

Use this study guide to review and prepare for the Unit 4 Test

STUDY GUIDE

• Practice each problem to be sure you understand HOW you got the right answer

• Practicing THESE problems will give you some HINTS into your test!

Multiple Choice

Priya has a recipe for banana bread. She uses 7 1/2 cups of flour to make 3 loaves of banana bread. If she made 6 loaves of banana bread, how many cups of flour will she need?

• 6

• 3

• 7.5

• 15

Multiple Choice

Priya has a recipe for banana bread. She uses 7 1/2 cups of flour to make 3 loaves of banana bread.

Andre will follow the same recipe. He will make b loaves of banana bread using f cups of flour.

Which of these equations represents the relationship between b and f?

• $b=\left(\frac{5}{2}\right)f$

• $b\ =\ \left(\frac{6}{4}\right)f$

• $b=\left(\frac{2}{15}\right)f$

Remember of the previous question, you should have divided 7 1/2 cups of flour by 3 loaves to fine the UNIT RATE.

 $7\frac{1}{2\ }\div3$  
keep change flip
 $\frac{15}{2}\times\frac{1}{3}$  = $\frac{15}{6}=\frac{5}{2}$  

Multiple Choice

75% as a decimal is

• 75

• 7.5

• .75

• 750

Multiple Choice

 $\frac{1}{5}$  as a percent is

• 5%

• 40%

• 20%

• 45%

If you did not get this last two slides right on your first try.....

watch this 5 minute video to refresh your math memory!

Multiple Choice

A car is 180 inches long. A truck is 75% longer than the car.

How long is the truck? (Hint: think about this being 75% MORE than the original)

• 135

• 240

• 255

• 315

Remember: 75% longer is the same as 175%, so if the truck is 180 inches then

180 inches x 175% = 315 inches

This is why we practice problems before a test!

Multiple Choice

A circular running track is 1/4 mile long. Elena runs on this track, completing each lap in 1/20 of an hour. How fast is Elena's speed in miles per hour? (Hint: think about what you need to do to find the UNIT RATE)

• 3 miles per hour

• 5 miles per hour

• 2 miles per hour

• 8 miles per hour

check your thinking Elena ran 1/4 mile in 1/20 of an hour

•  $\frac{1}{4\ }mile\ divided\ by\ \frac{1}{20}hour$  

•  $\frac{1}{4}\div\frac{1}{20}=$  

• KCF  $\frac{1}{4}\times\frac{20}{1}=$   $\frac{20}{4}=\ 5\ miles\ per\ hour$  

The next few slides will review percentages while we go shopping!

Everything in the store is marked down 20%

Here we go!

Multiple Choice

Today, everything at a store is on sale. The store offers a 20% discount. The regular price of a shirt is $18, what is the sale price of the shirt?

• $14.40

• $18

• $3.60

• $12

Multiple Choice

If an item in the store is marked $X. What math expression could we use to find the SALE PRICE of the item (how much we would pay) with the 20% OFF. (Hint: think about what 20% off means)

• 1.2x

• .8x

• .2x

• 1.8x

Multiple Choice

An item was found tagged with a sale price of $18. If the store is offering the 20% off sale, what was the ORIGINAL PRICE of the item? (Hint: the $18 is AFTER the 20% off)

• $9

• $14.40

• $18

• $22.50

The last one was tricky, you needed to.....

Take the $18 sale price -- and put it into the equation

Original x 80% = $18

then solve for what is missing by dividing both sides by 80%

Original = $22.50

ONE MORE SET TO GO!

Multiple Choice

Lin’s father is paying for a $20 meal. He has a 15%-off coupon for the meal. After the discount, a 7% sales tax is applied.

What does Lin’s father pay for the meal? (HINT: this has multiple steps, look at the total, take of the discount, and then add the tax)

• $18.19

• $21.40

• $17.10

• $13.64

Use this study guide!

The more you practice, the better prepared you will be for the test!