Intro to Algebra Study Guide

Simplify by combining like terms:

5a + 2b - 3a + 4

• 8a + 2b + 4

• 2a + 2b + 4

• 8ab

• 4ab + 4

Simplify: 2(4 + 9w)

• 8+9w

• 2+9

• 8+18w

• 2+9w

Simplify d + d + d + d =

• d⁴

• 4d

• d4

• 4 + d

• 8y+5
• 3y+3
• 7y+5
• 7y+4

• 1

• 4

• 3

• 2

A variable is . . .

• an awesome number

• a number represented by a letter

• an infinite number

• a number multiplied by another number

A variable represents what is ______________. 

• the answer

• the operation

• the difference

• unknown 

a mathematical sentence stating that two expressions are equal

• term

• coefficient

• equation

• variable

• 8

• 17

• 8 and 17

• No constants here

Simplify the expression: 4\left(3+2w\right)-w+2

• 7w+14

• 19w+2

• 21w

• w+14