Grade 9 Review

Like Terms

100

2x + 3y

cannot simplify since not like term

200

9x - 7x + 3x

5x

300

7x + 6y - 2y - 4x

3x + 4y

400

4x² - (-5x²) + (-6x²)

3x²

500

2x²y - (-x²y) - yx²

2x²y

Solving Equations

100

2x = 12

x = 6

200

-5x - 3 = 7

x = -2

300

2x + 8 = 5x - 1

x = 3

400

3x + 6=7x - 5 + 11

x = 0

500

7x - 1 = -2x + 9x

no solution

Exponent Laws

100

9⁰

1

200

5^-2

1/25

300

(2/3)²

4/9

400

-2⁴

-16

500

(-3/2)^-3

-8/27

y = mx + b

100

the slope of y = 5x - 8

m = 5

200

the y-intercept of y = 4 - 7x

b = 4

300

equation of the line if m = -4 and b = 0

y = -4x

400

slope = -2 and passes through (-1, 4)

y = -2x + 2

500

passes through (2, -5) and (3, -1)

y = 4x - 13

Potpurri

100

the number of groups in this classroom

10

200

the classroom number

2504

300

the chance that a hint given in class will be on a test

100%

400

the number of cycles + number of units

8

500

the number of years Mr. Taylor has been at LHSS

19