Mark runs 6 kilometers in 22 minutes. How many minutes will it take him to complete a 39- kilometer run?
please help

Which system of linear inequalites is represented by the graph?

The cost of using a service is $0.25 per min. what equation correctly represents the total cost c, in dollars, for d days of use?

Avery’s piggy bank has 300 nickels, 450 pennies, and 150 dimes. she randomly picks three coins. each time she picks a coin, she makes a note of it and puts it back into the piggy bank before picking the next coin.