7th Grade Review

Integers

100

8+(-12)

-4

200

7+(-15)

-8

300

(-2) + (-4)

-6

400

(-5) + 5

0

500

7 + (-15)

-8

One-Step Equations

100

4x=52

x=13

200

u-21=29

u=50

300

-30=2x

-15

400

7x=42

x=6

500

4x=52

x=13

Two Step Equations

100

-4b+3=35

b=-8

200

7=k/6+10

k=-18

300

3a-8=4

a=4

400

-2-7a=40

x=-6

500

-80+9x=-44

x=4

Proportional Relationships

100

Are these fractions proportional?

1/3, 3/9

Yes, when you cross multiply you get 9 for both sides of the equal sign. 

200

k/35=3/7

k=15

300

Is this slope positive or negative?

RISE- 2, RUN 3

2/3, slope is positive

400

3/5=12/x

x=20

500

Are these fractions proportional?

1.2/4, 2/5

No

Discount, Tax, Tip

100

How much would you save on a $5000 bicycle that is 30% off? 

$1500

200

A clothing store sells a shirt for $15 that is marked at 10% off. What is the discount amount?

$1.50

300

At Target, a $40 dress is marked down 10%. What is the new price of the dress?

$30

400

I can save 10% on $15 shirts. How much would I save per shirt?

$1.50

500

What is the total cost of a $25,750 car with 6.5% sales tax?

$27,423.73