First Quiz Review

Vocabulary

100

This is a symbol, usually a letter, that represents one or more numbers.

Variable

200

A mathematical sentence that uses an EQUAL SIGN

Equation

300

A mathematical phrase that can include numbers, variables, and operation symbols.

Algebraic Expression

400

3x + 5 = 20

What is the coefficient?

3

500

3x +2 =6x

What is the constant?

2

Algebraic Expressions

100

The difference of r and 3

r-3

200

the sum of fix times a number and two

5x + 2

300

The product of g and 4

4g

400

Twice a number minus 4

2x-4

500

6 less than triple a number

3x - 6

Solve

100

3 + 4 x 5

23

200

7 + (2 x 4) - 1

14

300

56 ÷ (4+4) + 3²

16

400

20 – (5+3) x 2 + 4

8

500

(5 x 4) – 6 ÷ 2 + 9

26

Solve

100

14 - 2 x 7

0

200

49 ÷ (3+4) + 5²

32

300

5 + 14 ÷ 2 × 5

40

400

(4-1)² + (5+ 1)²

45

500

1² + 2² x 3² - 4²

21

Evaluate the Expression

100

u + xy, for u = 18, x = 10, and y= 8

98

200

3(6a - 4b)

a=3  and b=2

30

300

4a + 6b

_______

     2

a=3   and   b=2  

12

400

Lexi has 725 pictures on her cellphone.  Her memory is getting full so she plans to delete 25 pictures each day.

Define the variable and write an expression that models the situation.

x=each day

725 - 25x

500

Lexi has 725 pictures on her cellphone.  Her memory is getting full so she plans to delete 25 pictures each day.

How many pictures will be on her cellphone after 10 days?

475 pictures