2.15: Addition and Subtraction Applications

The table shows the low outside temperatures for Monday, Tuesday, and Wednesday. By how many degrees did the low temperature increase from Monday to Tuesday?

11.9°

A biologist is recording the loss of fish in a pond. She notes the number of fish, f, in the pond on June 1. On July 1 there were 63 fish in the pond, which is 52 fewer fish that were in the pond on June 1. Which equation represents this situation?

f - 52 = 63

On Wednesday, William wrote a check in the amount of $45.60. This brought her balance down to -$15.75. Suppose n represents William's balance before she wrote the check. Which equation can be used to represent this situation?

n - 45.60 = -15.75

The table shows the low outside temperatures for Monday, Tuesday, and Wednesday. By how many degrees did the low temperature drop from Tuesday to Wednesday?

-9.4°

Solve the word problem. Tom plans to mow a lawn today to earn some extra money. He estimates that he will spend $1.80 on fuel and $3.45 on lunch. He will charge $11.50 to mow the lawn. What will be his profit for mowing the lawn?

$6.25