Math 3.5 Review

Vocabulary

100

What represents a Variable?

(This is not the definition)

Letter or Symbol

200

What is the definition of a Variable?

A symbol or letter than represents an unknown quanitity.

300

What is the definition of a Coefficient?

A number multipled (or times) a variable.

400

What is a constant number?

a number that remains the same or does not change.

500

_________ is a mathematical expression that contains at least one Variable and at least one operation.

Algebraic Expression.

Decimals

100

2x-0.5= 

x=1

1.5

200

4y+18=

y = 10

58

300

10a+147

a=10

247

400

100t-559=

t = 7

141

500

20b+31-37

X=20

394

Fractions

100

1(1/2) +1 =

1 1/2

200

6x+7=

x= 1/2

10

300

12x-2=

x=1/4

1

400

5x+7=

x= 1/8

7 5/8

500

7x+10=

X= 1/8

10 7/8

Whole Numbers

100

8x+3=

x = 11

91

200

7x - 29 =

x=6

13

300

10y-108=

y=17

62

400

11a+123=

a=11

244

500

12x - 19 = 

137

Multi Variable

100

2X + 3Y = 

X = 2

Y = 4

16

200

8X-4Y=

X=10

Y=9

44

300

10X+6Y=

X=12

Y=8

168

400

19y + 13y - 12x = 

Y= 2

x = 3

28

500

True or False

This solution is correct

20x + 18y = 363

x=14

y= 2

Incorrect.

Correct Answer is

20(14) + 18(2) =

 (280)  + (36) = 

          316