Name ______________________________________________________
Ch. 9 Study Guide
1. Jamie bought a music player on sale for $60. The original price was $80.
a. What percent discount did she receive?
b. If she had received a 35% discount instead, how much would she have paid?
c. Jamie only has $44. What discount will she need in order to pay only this much for the
music player?
2. Solve each equation or inequality below and graph the solution on the number line.
a. 12 < 5 + x
b. 13.6g ≥ 34
c.
!
"
𝑗=4
3. Ryan’s sister, Jollie, gets her height measured once a year. Here is the growth data that her
mother has written down for the last six years:
2.25 inches, 3.25 inches, 2 inches, 3.5 inches, 1.75 inches, and 2.25 inches.
a. How much has Jollie grown in the last six years?
b. Find the mean and median of her growth over the last six years.
c. Jollie wants to convince her basketball coach that she will grow a lot this year. Which
measure of central tendency should she use to try to convince the coach? Explain your
choice.
4. Atriangularsolidisshownhere.
a.
Whatistheareaofthe:
RightSide____________Front____________
b.
Whatisthetotalsurfaceareaofallfivefaces?
c.
Whatisthevolume?
Top
Front
Right
5. Arectangularsolidisshownhere.
a.
Whatistheareaofthe:
Top:____________RightSide____________Front____________
b.
Whatisthetotalsurfaceareaofallsixfaces?
c.
Whatisthevolume?
Top
Front
Right
6. Mentallycalculatethefollowing.
a.10%of$5.50_____________
b.1%of$48 _____________
c.20%of$4,400_____________
d.30%of$24_____________
7. Mrs.Templetonwasshoppingandfoundajacketthatoriginallycost$72.Thetagsaidthatthe
coatwasonsalefor25%off.Whatwasthepriceofthecoatonsale?Showyourwork.
8. Ms.Butlergoestolunchandhasabillof$13.70.Ifshewantstoleavea15%tip,whatwillher
totallunchbillbe?Showyourwork.
9. Jackscored40%onatestwith40questions.Howmanyquestionsdidheanswercorrectly?
10.Krisreadeachdayofhervacation.Thefollowingisalistofhowmanypagesshereadeachday:
98,39,83,54,84,75,52,96
a.Createastem-and-leafplottorepresentthisdata.
b.Createaboxplottorepresentthisdata(Writethenumbersaboveeachquartile.)
c.Whatistheinterquartilerangeforthisdata?
d.WhichrepresentationgivesyoumoreinformationaboutKris’data?Why?