Atrain travels 56 kilometers in 4 hours, and then 90 kilometers in 2 hours. what is its average speed?

You are a clerk at convenience store. a customer owes 11.69 for a bag of potatoes chips. she gives you a five dollar bill. how much change should the customer receive?

What is the rate of change of a line that passes through (2,-5) and (6,-2)?

Alicia puts $400 in a bank account. each year the account earns 5% simple interest. how much money will be in her bank account in six months?