Analyzing Equivalent Expressions

Which expression is equivalent to z + z² + 1?

• 3z

• 1 + z + z²

• 2z + 1

• 2z² + 1

Which expression is equivalent to 15x + 10 - 6x - 1?

• 9x + 9

• 18x

• 15x - 3

• 9x + 11

Which expression is equivalent to 12(5 - 4x)?

• 12x

• 17 - 16x

• 60 - 48x

• 60 - 4x

Which expression is equivalent to 3a² + 6a + 5a²?

• 14a²

• 14a

• 8a² + 6a

• 3a² + 11a

Which expression is equivalent to 6(3y - 2y + 7)?

• 18y + 7

• 21y - 14y + 7

• 18y + 42

• 6y + 42

Simplify: 6x + 12x + 3 y

• 21x

• 18x + 3y

• 72x + 3y

• 6x + 15y

Simplify: 
-8n - 7(n+5)

• -15n - 35

• -1n -35

• -15n +35

• n +5

Are the following expressions equivalent?

4( y - 1) and 1 + 4y

• yes

• no

Perry has 17 fewer baseball cards than Pete.
If b represents the number of cards Pete has, write an expression for how many baseball cards Perry has.

• b + 17

• b -17

• 17 - b

• 17 + b