11/2 - adding/subtracting linear expressions review

Find (2x + 3) + (x + 4)

• 2x + x

• 12 + 3x

• 2x² + 12

• 3x + 7

Find the difference:
(8 - u) - (5u + 1)

• 6u + 7 

• -4u + 7

• -6u + 7

• 4u - 7

(5x - 6) - (x + 2)

• 4x - 8

• 4x - 4

• 4x + 4

(x-1) + (2x+ 3)

• 3x + 2

• 2x² + 4

• 3x + (-2)

• 2x + 2

Which expression is equivalent to:

- 4 ( x + 2 ) - ( 8x + 3 )

• - 12x - 11

• - 12x + 11

• 12x - 11

• 12x + 11

• None