Math 8 Unit 3 Study Guide

Approximately 4 out of 5 students in Mrs. Haynes 7^th grade math class have cell phones.  If there are 365 students in the 7^th grade, how many would you expect to have a cell phone?

• 300
• 456
• 292
• 250

Jonah’s grandmother gave him $125 for his birthday.  He used 14% of the money to buy music on ITunes and 65% to purchase a new hockey stick.  How much more did he spend on the hockey stick than the music?

• $63.75
• $17.50
• $81.25
• $98.75

Robin ordered pizza and opted for delivery.  She prepaid $48.95 over the phone using her credit card and plans to given an 18% cash tip upon delivery.  If she has $7, will this be enough to cover the tip?

• Yes
• No

Cora is buying a $109 dress for the school dance.  She has two coupons, one for $10 off and one for 15% off.  If she is allowed to use both, is it better to take the $10 off first, then the 15%? Or is it better to take the 15% off first, then the $10 off? 

• Take the $10 off, then the 15% off
• Take the 15% off, then $10 off

Pete drove 224 miles in 4 hours on Saturday.  If he drives at the same rate on Sunday, how long would it take him to drive 490 miles?

• 1.83 hours
• 8.75 hours
• 66.5 hours
• 10.2 hours

Jack's bill at a restaurant came to $52.31.  He wants to leave a 15% tip.  How much will his total bill be, including tip?

• 52.46
• $7.85
• $60.16
• $44.46

Hotel rates are marked up 30% on a holiday weekend.  If it's Memorial Day weekend and the nightly rate at a hotel is normally $219, what is the new rate?

• $284.70
• $65.70
• $249
• $153.30

Find the total cost for a $479 laptop with a 8% sales tax.

• $38.32
• $440.68
• $487
• $517.32

Brett bought three pairs of jeans and five polo shirts.  The jeans that regularly sell for $79 were 35% off and the polo shirts that regularly sell for $39 were 15% off.  If sales tax is 5.75% and he gave the cashier $350, how much did he receive back in change?

• $89.36
• $187.09
• $11.81
• $184.25

Sarah started her diet on January 1st at 198 pounds.  By the end of the year she weighed 112 pounds.  Find the percent of change.

• 43.4% Increase
• 43.4% Decrease
• 76.8% Increase
• 76.8% Decrease