Algebra

If a=2 b=7, solve

(16 + a) - (b + 5) =

• 30

• 6

• 17

• 10

Simplify using the order of operations

(9 - 4) + 3²

• -4

• 64

• 14

• 225

Explain how to solve the following problem: 
9x = 54

• Multiply both sides by 7

• Divide both sides by 7 

• Add 7 to both sides

• Subtract 7 from both sides 

Simplify this expression (combine like terms):
 x + x + x + x

• 4x

• 4-x

• 4+x

• x⁴

-3(x - 3) + 6(x + 1)

• 3x + 6

• 3x + 4

• -3x + 16

• 3x + 15