7th: Simplify Alg. Expressions

Simplify the expression: 2x + 1 + 7x 

• 10x
• 10
• 9x + 1
• 9 + 1x

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

• 5x + 10y
• 5x + 4y
• 5x - 4y
• 5x -10y

Find the sum:  (3d - 5) + (d + 3)

• 4d + 8
• 2d + 8
• 2d - 2
• 4d - 2

Find the sum:  (3w - 8) + (-6w - 4)

• -3w + 12
• 9w + 12
• -3w - 12
• -9w - 12

What are the coefficients in the expression 8x - 3 + 12xy?

• -3, 8, 12

• x, y

• 8, 12

• There are no coefficients in this expression

Find the sum:
(7k + 9) + (4k - 3)

• 3k + 6 
• 11k + 6
• -11k + 6
• - 3k + 6

(7a + 4) - (9a + 2)
^{(its subtraction not addition)}

• -2a + 6
• 16a + 6
• -2a + 2
• 2a + 2

Find the difference (2x + 6) – (7x + 3).

• -5x + 3
• -5x + 9
• 9x + 9
• 5x + 3

Find the difference (2x + 5) − (x + 4).

• x + 1
• 3x + 9
• −x + 1
• x + 9