Matrices and Word Problems

Matrix High sells 2 types of tickets for its school play: adults and children.  The matrices show the prices and the number of tickets sold.  How much total money was earned over the 3 days from the school play? 

• $5840
• $6800
• $7220
• $8620

The SGA is selling flowers for Mother's Day. They purchase 200 roses, 150 carnations, and 100 orchids. The roses cost $1.67 each, the carnations are $1.03 each and the orchids are $2.59 each. Write a matrix to find the total cost of the flowers then find then total cost?

• $463.50

• $747.50

• $488.50

• $846.50

A used bookstore sells paperback books for $1.00 each, hardback books for $3.00 each, and CDs for $4.00 each.  On Saturday, they sold 37 paperbacks, 52 hardbacks, and 42 CDs.  What matrix operation would compute the store's total income for that day?

• A
• B
• C
• D

Carlos has investments in Funds A, B, and C.  Each fund invests money in both stocks and bonds.  The matrices show the dollar amounts invested in each fund and annual yields.  Use this information to determine how many dollars Fund B will earn in one year? 

• $1100
• $1500
• $2000
• $20000

Matrix A represents the amount of fruit Juanita purchased on 3 different trips to a store.  Matrix B gives the price per pound of each type of fruit.  What matrix gives the amount Juanita spent on each trip? 

• A
• B
• C
• D

Ashok, Kiri, and Justin designed 3 computer games. The matrix shows their sale of each game during the first month.  Their goal is to double the number of games sold each month for the next 4 months.  What matrix represents their goal?  

• A
• B
• C
• D