My driveway is 9/13 of a mile, how many yards is this?

Two times a number plus three times another number equals 4. three times the first number plus four times the other number is 7. find the numbers

Sanya noticed that the temperature was falling at a steady rate of 1.4 degrees every hour from the time that she first checked her outdoor thermometer. by 6 a.m., the temperature had fallen 21 degrees. which expression can you use to find how many hours earlier she had first checked the thermometer?

How long must $542 be invested at a rate of 7% to earn $303.52 in interest? in a easier way