Pre alg review 2

Unit 2

100

Solve: -6 + 8a -16

8a-22

200

solve: 5(n + 6) -21 

5n + 9 

300

Simplify and factor: 7x-2y-8y+11x

2(9x-5y)

400

(-2ab)(6a^2b^3)

-12a#b^4

500

Solve and write in scientific notation: (9.5 x 10^-2)(1.4 x 10^-3)

1.33 x 10^-4

Unit 3

100

solve for h: 24 = -3 + h

h = 27

200

solve for x: (x-1)/6 = 2

x =13

300

k^2 +20 = 420 solve for k

k= +20, -20

400

solve for y: -2y + 22 < 18

y >2

500

-2(5k-7) <= 11-3(k+6)

k >= 3

Unit 4

100

Write this as a ratio: 28 minutes to 1 hour

7/15

200

Are 4/36 and 15/135 proportional?

Yes 1/8

300

Solve for r: (r-1)/5 = (r+6)/10

r= 8

400

18 is what percent of 40?

45 percent

500

Find the final price of a sofa that costs 625 with a 3 percent markup. 

643.75

Unit 5

100

What is slope?

rise/run

200

T/F A function cannot have repeated x values.

T

300

What is the slope of (-4,1) and (11,1)

0

400

Change to slope intercept form: 5x + 2y =6 

y = -5/2x + 3

500

Write the equation of a vertical line at x = -2

x =-2

Unit 6

100

If two lines are parallel they have no solution. (T/F)

T

200

Solve for x,y:      y= -4 , 3x-5y =23

(1, -4)

300

Solve for x,y: 2x+4y=-2, 5x-y=6

(1,-1)

400

Solve for x,y : 2x-3y=-20,  7x-y=-13

(-1,6)