Algebraic and Numeric Expressions

What is the coefficient of 3b

• b

• 3

• 3

• 4b

• b

When you substitute a number you...

• replace a number with a different number

• replace an operation with a different operation

• replace a variable with a number

• subtract the number from another number

Which two operations follow the associative property?

• multiplication and division

• subtraction and multiplication

• Addition and multiplication

• Division and subtraction

Select the expression that is equivalent to 6(3m + 9)

• 9m + 15

• 18m + 9

• 18m + 54

• 3(m+ 12)

Select all expressions that are equivalent to 6(b + 2) – b.

• 6b + 8 – b

• 
  5b + 8

• 
  5b + 12

• 
  6b + 12 – b

Which expression represents 3 times the sum of x and 7?

• 
  3 + 7x

• 3x + 7

• 3(x+7)

• 3x + 7x

Sunday brunch at a local restaurant costs $12.94 per person. Let n represent the total number of people eating brunch together. Which expression could be used to find the cost of brunch for an entire group?

• 12.94 + n

• 12.94 - n

• 12.94n

A variable is a symbol, usually a letter, used to represent an unknown number.

• True

• False

Select all expressions equivalent to 32 + 40x using the distributive property.

• 
  8 (5x + 4)

• 
  5 (6 + 8x)

• 
  4 (8 + 10x)

• 
  2 (16 + 20x)