Marta works as a janitor. if marta worked for 8 hours and earned $73.68, how much did she earn per hour?

Are carpet coast $15 per square metre. the total delivery charge is $21 peter buys n squared metres of carpet what is the expression which represents the total cost in $

Evaluate 8j -k+148j−k+14 when j=0.25j=0.25 and k=1k=1.

Two airplanes start at the same place and travel in opposite directions,one at 395 miles per hour and the other at 422 miles per hour. how many hours will it take for the planes to be 2451 miles apart?