7.EE Review

What is the difference between an equation and an expression?

• An equation has an equal sign and an expression does not.
• An expression has an equal sign and an equation does not.
• This must be a trick! They are the same thing!
• One has variables and the other does not.

 2(-8+7c) 

• 16+14c
• 30c
• -23c
• 14c+(-16)

4+(-7)-10x+5x

• -5x-3
• 24+35x
• -6-15x
• 15x+3

 6(-4+3)+5v+10v

• 9v
• 21v
• 6+15v
• -6+15v

3(10-8x)

• 30x+24
• 30-24x
• 78x
• 24x

How many terms are in the following expression?
x²+7x-13

• 1
• 2
• 3
• 6

(3-9y+8y) 

• -y+3
• 2y
• y-3
• 27+17y

Which of the following does NOT represent an equivalent expression for 8x+4?

• 4(2x+1)
• (2x+1)+(2x+1)+(2x+1)+(2x+1)
• 2(4x+2)
• 2x(4+2)

A cell phone company dropped the prices on their phones by 9%. Which expression shows the NEW PRICE of the phone, p?

• p - 0.09p
• p - 1.09p
• p x 0.09p
• p - 0.09

Over the summer gas prices dropped by 3%. Which expression shows the NEW PRICE of a gallon of gas, g?

• g x 0.03
• g - 1.03g
• g - 0.03g
• g - 0.03