Combining Expressions

Simplify the expression by combining like terms.

9x²+14x-x²+6x

• 8x²+20x

• 9x²+20x

• 10x²+20x

• 8x²+8x

Combine like terms
3x + 2x + 3y - 7y

• 5x + 10y

• 5x + 4y

• 5x - 4y

• 5x -10y

Simplify the expression: 7v + 2 + 12 + 2v

• 23

• 23v

• 9 + 14v

• 9v + 14

Simplify by combining like terms:
5a + 2b - 3a + 4

• 8a + 2b + 4

• 2a + 2b + 4

• 8ab

• 4ab + 4

Simplify the expression by COMBINING LIKE TERMS.

Mathematical Equivalence

ON

Nicholas's teacher gave him the final expression "7x+5" and asked him to match this with two correct original expressions given in the list below. Which two original expressions simplify to 7x+5?

• 2x + 1+ 5x + 4

• 10x + 2 - 3x + 3

• x +2 + 4x + 5

• 2x+ 3+ 3x + 4

Mrs. Salpietro has 8x+7 feet of rope for a project she is making. But she needs another 15 feet still. How much rope will she have total for her project?

• 8x+22 feet

• 23x + 7 feet

• 30x feet

• 30 feet

Simplify:

5x - 6x - 8x + 7

• -9x + 7

• 10x + 7

• 9x + 7

• 9x - 7

y + x + y + y + x 

• 2 + 3 

• x + y 

• 2x + 3y 

• 5xy 

To combine like terms in an expression, the terms must have the same ​ ​ (a)   and ​ (b)  

• variable

• exponent

• constant

• coefficients

• coefficient