Eliza's backpack weighs 18 7 pounds with her math book in it. Without her math book, her backpack weighs 7 40:18 How much does Eliza's math book weigh?

If the sales price of a dvd is $20 and the markup is 34%, what is the cost of the dvd?

Aparticular telephone number is used to receive both voice calls and fax messages. suppose that 25% of the incoming calls involve fax messages, and consider a sample of 25 incoming calls. (a) what is the expected number of calls among the 25 that involve a fax message?

Which of the following are independent events? a) knowing that it is going to rain tomorrow, and bringing an umbrella to schoolb) knowing that you have to get up early tomorrow, and going to bed before 9 p.mc) knowing that it is going to rain tomorrow, and going to bed before 9 p.md) knowing that you have a test in school tomorrow, and studying thw night before