Chapter 7 Review

Which expression represents the phrase, the sum of three different numbers?

• 3+x

• 3x

• x+x+x

• x+y+z

Tags

6-3.3

• 36 times a number

• a number split into 36 equal groups

• 36 taken from a number

• 36 divided by an unknown number

Tags

6-3.3

SELECT ALL CORRECT ANSWERS.

Which expression represents the phrase, a number times itself, times itself again?

• 3x

• x+x+x

Tags

6-3.3

Match each phrase with the expression that accurately represents it.

• 5x

• a number decreased by 5

• 5+5x

• 5 decreased by a number

• x-5

• 5 added to 5 times a number

• 5-x

• 5 times a number

• x+5

• 5 more than a number

Tags

6-3.3

Select each phrase that correctly represents the expression, 5x.

• the product of a number and 5

• a number increased by 5

• 5 times a number

• a number times itself, times itself again, times itself again, times itself again

Tags

6-3.3

Which phrase accurately represents the expression, 7x-2 ?

• two more than a number

• seven less than 2 times a number

• seven times a number

• two taken from seven times a number

Tags

6-3.3

Which expression represents 8 less than nine times a number?

• 8-9x

• 9x-8

• 8x-9

• 9x+8

Tags

6-3.3

What is a variable?

• a term that includes a variable

• a letter that stands for an unknown number

• a term that is a known number without variables

What is the coefficient in the expression 10-4x?

Evaluate when b= 3 
2(3 + b) + 6b - 12

• 14
• 15
• 18
• 16