Simplifying Expressions by Combining Like Terms

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

• 8a + 2b + 4

• 2a + 2b + 4

• 8ab

• 4ab + 4

Simplify by combining like terms:

x + 3x + 6x + x

• 9x

• 11x

• 2x + 9x

• Can't be simplified

Simplify by combining like terms:

7t - 3t + t - 3t

• 2t

• 8t - 6t

• 14t

• Can't be simplified

Simplify by combining like terms:
4x² - 3x + 11 -2x

• 4x² - 5x + 11

• 11x + 11

• 16x² - 5x + 11

• 10x²

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(a)  

• F

• G

• H

• J

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

Simplify
(3x² +2x -1) - 2(x+4)

• 3x² - 9

• 3x² - 4x - 9

• 3x²+ 4x - 9

• 3x²+ 3x + 1

(7x + 12) - (4x + 3)

• 7x + 7

• 3x + 9

• 6x - 9

• -4x + 11

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