Ch. 1 Review

Variables and Expressions

100

the sum of a number x and 20 

x + 20

200

19 less a number z

19 - z

300

21 less than the product of 4 and a number n

4n - 21

400

The product of a number t and 7 increased by 9

7t + 9

500

The product of a number x and 8 less the product of another number y and 5

8x - 5y

PEMDAS

100

8 + 12 - 27 = 

-7

200

4 + 16 * 2 - 8 = 

28

300

8 * 2 + 18 / 3 + 3 = 

25

400

5(9 + 7) + 4² = 

96

500

5³ - 15 * 2 + 5

100

More PEMDAS

100

46 + 5 * 4 = 

66

200

90 / 10 * 12 + 4 = 

112

300

18 * 4 / 9 * 10 = 

80

400

(12-5)² - 4 * 12 = 

1 

500

(5² -7) * 2 - 45 = 

-9

Combining Like Terms

100

3x + y + 4x

7x + y

200

8x - 3x + 9y - 4y

5x + 5y

300

12x + 7y - 4x + 2y

8x + 2y

400

4x + 8y + 2z - x - 3y

3x + 5y + 2z

500

4x² + 5x + 4y + 6x + - 2x² + 2y

2x² + 11x + 6y

Quick Hits

100

When graphing a function the x axis is the _________ variable

independent 

200

Which Property is shown in the examples below?

x + y = y + x

4 + 5 = 5 + 4 

Commutative Property

300

An example that shows that that a conditional “if,then” statement is not true is called what?

a counter example 

400

Which property is shown in the examples below?

x(y + z). = xy + xz

4(2 + 3) = 8 + 12

Distributive Property

500

A decimal that does not end or repeat is called an __________ number

irrational