Equivalent Expressions

What is another way to write ab?

• a + b

• a - b

• ba

• a/b

Anna baked 3 batches of cookies with c

cookies in each batch. She then ate 8 cookies!

How many cookies does Anna have left?

Write your answer as an expression.

• 3c = 8

• 8c - 3

• 3c - 8

• 3c + 8

Evaluate 8x + 3 + 7x + 2.

• 15x + 6

• 15x + 5

• 14x + 5

• 16x + 5

Grandma Gertrude gave 13 pieces of jewelry and Grandma Fien gave y pieces of jewelry to the Carlson sisters to divide evenly among themselves. There are 5 Carlson sisters.

How many pieces of jewelry did each sister receive?

Write your answer as an expression.

• 13 + y/5

• 5(13 + y)

• y(13 + 5)

• 13 x y/5

What is another way to write 2 + 3?

• 2 x 3

• 3 + 2

• 3 x 2

• 32

Eiko is wearing a magic ring that increases the power of her healing spell by 30% percent. Without the ring, her healing spell restores H health points.

Which of the following expressions could represent how many health points the spell restores when Eiko is wearing the magic?

Select all the apply.

• 0.7H

• 130/100H

• (3/10 + 1)H

• H - 0.30H

• 30 + H

What is another way to write -3c - 6c?

Select all that apply.

• 2c + -5c + -6c

• c - 9

• -10c

• c x -9

After the outbreak of a mysterious disease, the average wait time at a hospital increased by 70%. Before the outbreak, the average wait time at the hospital was m minutes.

Which of the following expressions could represent the average wait time at the hospital after the outbreak?

Select all that apply.

• 1.7m

• 170/100m

• 0.7m

• m + 70

• m + 0.7

What is another way to write 8a + 7a?

• 14a

• -2a + 10a + 7a

• a x 15

• a + 15

A new soup recipe contains 33% less sodium per serving than the old soup recipe. The old soup recipe contained x milligrams of sodium per serving.

Which of the following expressions could represent the amount of sodium per serving, in milligrams, in the new soup recipe?

Select all that apply.

• x - 33x

• 0.67x

• 0.33x

• x - 33

• (1 - 33/100)x