Expressions Test Review

Select all the expressions that represent the sum of two terms.

Select all expressions below that represent the sum of five squared and twenty-two

Select all expressions below that represent the sum of seven cubed and eighty-six

Simplify the expression: 8x + 7y + 5x + 2y

Enter an expression that shows the sum of exactly two terms that is equivalent to 8x + 7y + 5x + 2y.

Consider the expression: 4(2x+5y)

Enter an expression that shows the sum of exactly two terms that are equivalent to 4(2x+5y)

Dan attempted to simplify the expression 4(y+6+3). His steps are shown below.

Step 1: 4(y+6)+3 = (4y+6) +3

Step 2: 4(y+6)+3 = 4y +(6+3)

Step 3: 4(y+6) + 3 = 4y+9

In which step, if any, did he make his first error?

• Step 1

• Step 2

• Step 3

• Dan did not make any mistakes in his work