8th Grade Math Review

Slope

100

What does slope mean?

Rise/Run or Down/Run

200

What is the slope?

y = -1/4x +1/4

-1/4

300

3x +y = 4

slope = -3

400

4x +2y = 10

slope=-2

500

-5x + 10y = -8

slope = 1/2

Find x

100

2x + 4 = 8

x = 2

200

3x - 4 = 20

x = 8

300

5x + 5 +3x = 45

x = 5

400

2x - 5 =-5x + 9

x = 7

500

3x - 6 - 9x = 7 + 5x - 46

3x - 6 - 9x = 7 + 5x - 46

-6x-6 = -39 + 5x

-11x-6 = -39

x = 3

Graphing

100

Graph y = 1/2x + 4

start on (0,4) then go up 1,over 2.

200

Graph y= -2/3x - 4

start at (0,-4) then go down 2, over 3

300

Graph 2x + y= 4

y = -2x + 4

Start at (0,4), then go down 2 over 1

400

Graph 3x - y= 5

- y = -3x + 5

y = 3x - 5

start at (0,-5) go up 3 over 1

500

Graph 4x - 2y = -8

y = 1/2x + 4

Start at (0,4) then go up 1 over 2

What Solution?

100

Name the 3 types of solutions.

1- One Solution

2- No Solution

3- Infinitely Many Solutions

200

Solve: -3x +5 = -3x + 9

5 = 9

No solution

300

Solve: -5x + 12 = 3x - 12

x = 8 

One Solution

400

Solve: 5x + 10x + 9 = 6x + 9x + 9

9=9

Infinitely Many Solutions

500

2(x +3) -10x = -34

-8x + 6 = -34

-8x = -40

x = -5

One solution

Random

100

Solve -(5)³

-125

200

What is 0.00000586 in scientific notation?

5.86 x 10^-6

300

Solve: 4³/4⁶

4^-3 = 1/4³ = 1/64

400

What is Mrs. Rin's last name?

Isnassuos

500

How many weeks are in a year?

52