Mid-year Review 8th Grade Math

Exponents

100

10²

100

200

5^-3

1/5³

300

(x²)(x⁴)

x⁶

400

(a³)⁴

a¹²

500

k¹⁰/k

k⁹

Equations

100

2x + 5 = 11

3

200

x/5 + 4 = 19

x=3

300

4x - 1 = 2x + 5

x=3

400

2x + 1 = 4x

1/2

500

3x + 4=2x +5

x=1

Functions

100

In order to be a function, which variable cannot repeat?

x, input, independent

200

Is this a function? (2,3), (3,4), (2,6)

not a function

300

Is this a function? (1,2), (3,1), (2,3)

Function

400

Sam has $30.  He will save $5 every week. Write an equation to represent this situation.

y=5x+30

500

A factory produce 3 cars today.  It will continue to make 5 cars per hour. Write an equation to represent this situation.

y=5x+3

Scientific Notation

100

What is 2.3x10^-2 in standard form?

0.023

200

What is 2.5x10² in standard notation?

250

300

What is 1.5x10^-5 in standard notation?

0.000015

400

What is 0.0045 in scientific notation?

4.5 x 10^-3

500

What is 35700000 in scientific notation?

3.57 x 10⁷

Linear Equations

100

What is the slope of the equation y=2x+4?

2

200

What is the y-intercept of the equation y=3x+5?

5

300

What type of slope is y=4x+5?

positive

400

What type of slope is y=-1/4x+5?

negative

500

What is the slope of the equation y=2+4x?

4