Algebra I Review

Solve Equations

100

2x+6=4(x-12)

x=27

200

2(x+5)=7x-1

x=11/5

300

8/3 r  − 9/4  r  =  − 5/12

r=-1

400

1/2(x+8)=3x - 7

x=22/5

500

12x+37=8x+1

x=-9

Slope/Intercept Form

100

What is the slope of the line passing thru (0,1) and (5,-1)?

-2/5

200

What is the equation of the line with slope -3 that passes thru (4,-2)?

y=-3x+10

300

Write the equation of the line passing thru (0,1) and (5,-1).

y=-2/5x+1

400

Write the equation of the line with slope -6/7 that passes thru (14,-2).

y=-6/7x+10

500

What is the equation of the line passing thru (3,9) and (3,-6)?

x=3

Proportions

100

3/4=x/16

x=12

200

21/7=81/x

x=27

300

(x+3)/5=10/15

x=1/3

400

15/75 is what percent?

20%

500

30% of 63 is ?

18.9

Absolute Value

100

2|x-6| = 12

x=12, 0

200

|x-6|>12

x>18 or x<-6

300

-2|3(x+7)-12|=6

No solution

400

-2|3(x+7)-12|< 6

-4 < x <-2

500

-3|x-6|+4 < -14

x<0 or x>12

Misc

100

Write the equation of the line with slope -3/2 that passes thru (-6,8) in point-slope form.

y-8=-3/2(x+6)

200

What is the slope of a line perpendicular to the line:

3x+7y=15?

7/3

300

What is the domain of the following relation:

(-1,3) (3,9) (-5,8) (10,37) (-1,6)

-1,3,-5,10

400

Is the following relation a function?

(-1,3) (3,9) (-5,8) (10,37) (-1,6)

No

500

What is the equation of a line perpendicular to y=-3x+6 thru the point (1,2) ?

y= 1/3x +5/3