Lesson 16 Review

How many terms does the expression  $2x-1$  have?

• 1

• 2

• 3

• 4

 $3x+2\$  has two variable terms.

• True

• False

The coefficient in the expression  $6x-3$  is what?

• - 3

• 3

• x

• 6

What is a variable?

• a known number

• a term that is a known number

• a letter that stands for an unknown number

• letters should not be in math

Which expression means "3 less than 6 times a number"?

• $6x-3$

• $3-6x$

• $6\left(x-3\right)$

• $x-18$

Which expression means "triple the difference of 6 less than a number"?

• $3x-6$

• $6-3x$

• $3\left(6-x\right)$

• $3\left(x-6\right)$

Which expression means "subtract 6 from a number cubed"?

• $6-x^3$

• $x^3-6$

• $x-6^3$

• $6^3-x$

Where did Mrs. Stout live until she was 13?

• Kansas City

• Papua New Guinea

• Indiana

• the South Pole

A food truck sells hotdogs for $2 and hamburgers for $3. Which two expressions could represent the cost to buy any number of hotdogs and hamburgers?

• $2x+3y$

• $2+x+3+y$

• $3y+2x$

• $2x+3+y$

 Your expression from the last problem should have been $2x+3y$ .  Evaluate this expression to find the total cost if you wanted to buy 3 hotdogs and 5 hamburgers for you and your friends.

• $11

• $20

• $17

• $21