College Algebra Test 2 Review (pt.2)

2.1 Combining Like Terms

100

Simplify

2x-5y+3x

5x-5y

200

Simplify

-4(x+2y-5)

-4x-8y+20

300

Simplify 

-(x+7y)+2x

x-7y

400

Simplify

4(x+3)+2(-5+3x)

10x+2

500

Simplify 

(1/4)x + 2 + (3/5)x - 5

(17/20)x - 3

or

0.85x - 3

2.2-2.3 Properties of Equality

100

Solve 

x+5=18

x=13

200

Solve 

3x=18

x=6

300

Solve 

(1/4)x=8

x=32

400

Solve

(2/3)x=10

x=15

500

Solve 

-5x=1/4

x= -1/20 or -0.05

2.4-2.5 Solving Linear Equations

100

Solve

3(x-2)=6

x=4

200

Solve 

1+5x=12

x= 11/5 or 2.2

300

Solve 

8x-5 = -4x+19

x=2

400

Solve 

4(2x-3)+4 = 8x-8

all real numbers

500

Solve

2(x+7) = 6x+9-4x

no solution

2.6 Formulas

100

d=rt

Find d when r=50 mph and t=3 hrs

d=150 miles

200

A= (1/2)bh

Find the area of a triangle whose base is 12 ft and height is 14 ft

84 ft²

300

Find the perimeter of a square if one side is 4 cm.

P = 16 cm

400

Write 6x+2y=-12 in y=mx+b form

y=-3x-6

500

V=lwh

Find the length of a rectangular prism if the width is 8 in, the height is 6 in, and the volume is 720 in.

l = 15 in

2.7 Ratios and Proportions

100

Write in lowest terms:

4 ft : 10 ft

2 : 5

200

Solve

x/6 = 8/3

x=16

300

Solve 

5/20 = x/80

x=20

400

Solve

20/45 = 15/x

x= 135/4 or 33.75

500

Solve

-7/9 = -12/x

x=108/7 or 15.428...