7th grade final review

Cross multiplying

100

The scale factor on a floor plan is 1 in: 6 ft. What is the actual distance represented by a

3 inches on the floor plan?

18 ft

200

A roll of 20 quarters weighs 4 ounces. Which proportion can be used to find the weight, in ounces, of 100 quarters?

x=20

300

Harriet paid $343 for 7 fruit trees. If each of the trees cost the same, what is the cost for

2 trees?

98

400

7/x=21/6

x=2

500

2/3=x/9

x=6

Equations

100

(x+8)/2=10

x=12

200

x/8+12=4

x=-64

300

31=5x-9

x=8

400

18-2x=50

x=-16

500

-3x+12=21

x=-3

More Equations

100

7x+4=25

x=3

200

-2x-5=25

x=-15

300

Solve 5x-10=20

x=6

400

Solve: - 3y + 4 = -11

y=5

500

Craig went bowling with $30 to spend. He rented shoes for $5.25 and paid $4.00 for each game. What was the greatest number of games Craig could have played?

x=6

Expressions

100

Evaluate p - q for p = -13 and q = -50.

37

200

Evaluate p - q for p = 12 and q = 50.

-38

300

Which expression is equivalent to

1/2(8x + 12)

4x+6

400

Simplify: -10 + 4 - (-2)

-4

500

Simplify (14 + 6y) + (2y - 16)

8y-2

Distributive property

100

8(x+8)

8x+64

200

5(2+4x)

10+20x

300

3(-x+2y+9)

-3x+6y+27

400

-2(-5x+6)

-10x-12

500

2/3(9x+12)

6x+9