Unit 4 Review

Solving Equations

100

5x = 25

x = 5

200

2x/7 = 4

x = 14

300

4x - 3 = -2x + 9

x = 2

400

(3x + 1) / 2  = -6x / 4

x = -1/6

500

x/3 + 10 + x = -2x - 5

x = -4.5

Distributive Property

100

Simplify:

6(y - 3) 

6y - 18

200

-5(2x - 8) + 3

-10x + 43

300

7x(x - 3) - (3x + 2) 

7x^2 -24x -2

400

-9(-3 - 4x) +x(3 + 2) -x

40x + 27

500

6(2x - y) -3(4y - x)

15x - 18y

Rearranging Formulas

100

A = lw for w

w = A/L

200

3a + 6b = 12c

rearrange for a

a = 4c - 2b

300

y = mx + b

rearrange for x

x = (y - b)/m

400

D = st + at 

rearrange for s

(D - at)/t = s

Standard Form

100

Name one of the rules for standard form

- no fractions/decimals

-A needs to be positive

-A and B can't be zero

200

write y=7x - 1  in standard form

7x - y - 1 =0

300

Write  8x - 4y + 16 = 0 in slope-y-intercept form

y = 2x + 4

400

Write y=-1/3x + 5 in standard form

x + 3y - 15 = 0

500

y = 0.5x + 7

x -2y + 14 = 0