Adding and Subtracting Matrices — Unit test Answers

The picture shows how much money Aaron has in his jacket pocket. If he uses $1.12 to buy a soda, how much money does he have left?

Valerie earns $12.20 per hour. If she worked for 7.75 hours yesterday, how much did she earn?

Leora had some money in her wallet. She spent $18.62 buying groceries and had $43.55 left. How much money did she have in her wallet before she bought the groceries?

Mirele needs to buy fencing to completely surround her backyard pool. How much fencing should she buy?

In the equation below, variables S, T, and U represent three matrices. Which property of matrix addition is illustrated below?