Unit 3, 5, and 6 Review

Expressions

100

14x - 19 + 23x – 15

37x-34

200

-5xy - 12x - 7xy +11y

-12xy-12x+11y

300

11x + 7 + 13x - 22x

-2x+7 or 7-2x

400

-3.8x - 9 + 2.4x

-1.4x - 9

500

( 6x + 9 ) + 3( 10x + 15 )

36x+54

Integers

100

-2(-2)(-3)÷ -4

3

200

8+3(3-(-12))

53

300

3((-5)+2)÷(-3)

3

400

24÷ (-4 - (-7)) - 5 - 2(10)

-17

500

Frank was swimming 7 feet below sea level when he spotted a whale. It is estimated that the whale was swimming 69 feet below Frank. What was the depth the whale was swimming?

-76 or 76 feet below sea level.

Equations

100

7x=49

x=7

200

x-14= -9

x=5

300

x/6=12

x=72

400

-7x- 11= 17

x=-4

500

4a +5.6= -2.8

a=-2.1

Circles

100

If you are given a radius of 6cm, what is the circumference in terms of π?

12π cm

200

What is the circumference of a circle if it has a diameter of 5.2m?

16.33m

300

If you have a circular mirror with a radius of 20cm, what is its area in terms of π?

400π cm²

400

A circle has a diameter of 25cm. What is it's area to the nearest hundredth?

490.63cm²

500

The circumference is 12pi. What is its radius?

6

Inequalities

100

x+9 < 16

x<7

200

8x ≥ 32

x ≥ 4

300

x/-6< -5

x>30

400

5b+8 > -12

b>-4

500

-9b+7 < 52

b>-5