Matrices

How do we label a matrix?

• Column x Row

• Row x Column

What are the dimensions of Matrix P?

• 3 x 4

• 4 x 3

• 3 x 3

• 2 x 4

What is element P23?

• 10

• 7

• 8

• 11

Holiday rent-a-car rents a compact car for $24.95 per day plus $.23 per mile. Cargo rent-a-car rents a compact car for $22.95 per day plus $.31 per mile. What daily mileage gives the same rental charge for both cars?

Missy has 10 coins in her pocket – quarters, dimes and nickels. She has 2 more dimes than nickels and the coins are worth $1.50 in all. How many nickels does she have?

A store began selling its line of fall sweaters. On the first day, 6 cotton, 4 nylon, and 5 wool sweaters were sold. On the second day, 3 cotton, 5 nylon and 8 wool sweaters were sold. On the third day, 4 cotton, 1 nylon and 4 wool sweaters were sold. Total sales for the 3 days were $395, $505, and $260 respectively. What was the sale price for cotton sweaters?

Melissa, Wes and Daryl went to Fred’s burgers to get food for their friends at school. Melissa spent $6.35 on 2 burgers, one order of fries and 2 cokes. Wes ordered 1 burger, 2 orders of fries and 2 cokes. His bill was $5.45. Daryl’s order of 3 burgers, 3 orders of fries and 3 cokes totaled $11.01. What is the cost of one order of fries?

Tags

CCSS.7.EE.B.3

At a football game, student tickets cost $3 each, adult tickets are $4.50 each and children’s tickets cost $2.50 each. Four times as many adult tickets were sold as children’s tickets. The total number of children’s and adult tickets was half the number of student tickets. If $8,736.50 was taken in receipts, how many student tickets were sold?

The marketing department of a company has a budget of $30,000 for advertising. A television ad costs $1000, a radio ad costs $200, and a newspaper ad costs $500. The department wants to run 60 ads per month and have as many radio ads as television and newspaper ads combined. How many radio ads can the marketing department run each month?

At a pizza shop, two small pizzas, a liter of soda, and a salad cost $14; one small pizza, a liter of soda, and three salads cost $15; and three small pizzas and a liter of soda cost $16. What is the cost of one salad?