Introduction to Algebra Review

What is an expression for this table
 Input   Output
1              4
2              6
3              8
4             10
5              12

• 2n+2

• 4n

• 4n-2

• n+3

What is the expression for the table:

Input Output

1 2

2 5

3 8

4 11

5 14

• n+1

• 2n

• 3n-1

• n+3

What is the difference between an equation and an expression?

• There is no difference

• An equation has an answer and an expression could have an answer.

• Equation can only have one term after the equals sign and an expression could have one or more terms after the equals sign.

• An expression we do not know what one quantity is equal to and an equation we know what one quantity is equal to another quantity.

Is this an expression or equation

• expression

• equation

Is this an expression or an equation

3n+14=26

• expression

• equation

Zena bought 3 cds and each one costs the same amount. Total cost was $36. What is the equation

• 3n=36

• 3+n=36

• 3x12=36

A number divided by 3 is 10.

• 3n=10

• 3-n=10

• n/3=10

What does the term TIMES mean in terms of Algebra?

• Multiply

• 12:00

• Addition

Simplify the expression:
2(7 + 5y) - 2

• 12 + 10y

• 14 + 3y

• 12 - 3y

• 16 + 10y

Solve for the missing variable:
3 + 5m = 43

• m = 8

• m = 9

• m = 12

• m = 43