PR Math I- Review

Expressions

100

Simplify the expression.

2x + 4x

6x

200

Simplify the expression.

3y + 2 - 2y

y + 2

300

Simplify the expression.

3(x - 4)

3x - 12

400

Simplify the expression.

-2(4x + 3)

-8x - 6

500

Simplify the expression. 

-3(y- 2y + 4)

3y -12

Vocab

100

To find the slope on a graph, count the ____________ over ____________?

Rise over run

200

When terms have the same variable and the same exponent they are said to be _______________?

Like terms

300

What is this symbol? 

<

Less than

400

When graphing in slope intercept form, always graph the _________________ first?

b or y-intercept

500

Which formula should you use to write an equation when you have a point and a slope?

Point slope formula

Slope

100

Find the slope.

(1,-3) (2, 0)

3

200

Find the slope. 

(4, 4)(3, 3)

1

300

Find the slope.

(7, 2) (4, 2)

0

400

Find the slope.

(9, -3) (9, -1)

undefined

500

Find the slope. 

(-1, -5) (-2, -6)

1

Formulas

100

What is the slope formula?

y₂ - y₁ / x₂ - x₁

200

What is the slope intercept form?

y = mx + b

300

What is the point-slope form?

y - y₁ = m(x - x₁)

400

What is the direct variation equation?

y = kx

or y = mx

500

What is the standard for for a linear equation?

Ax + By = C

Solve

100

x + 4 = 8

x = 4

200

2x -3 = 7

x = 5

300

3x -1 =14

x = 5

400

2(x + 5) = 30

x = 10

500

3x + 6 = 3x -2

No solution!