7k+4l=20 and - 8k+2l=10

What is the value of k?

Sarah makes $10 an hour babysitting and $5 an hour gardening. her goal is to make $80 a week while working 12 hours. how many hours will Sarah have to work at each job to accomplish her goal

A quarter back is sacked for loss of 5 yards. Then the team gains 12 yards. What integer can be used to explain the net gain or loss of the three plays?

Bill has a box of markers that has a base of 8 cm by 20 cm and a height of 6 cm. Martin's pencil box has a height of 4 cm and a base that is 15 cm by 16 cm. Bill says his marker box has the same volume as Martin's pencil box.

The perimeter of a square is 28ft. can you conclude that area of the square is 49 square feet? Explain.

If a man weighs 300 pounds on Earth, his mass on Earth is 136 kilograms. What would his mass be if he was on the moon?

How to turn 7/48 in lower term

Which statement describes the domain of the function f (x) = 3x / 4x2-4? A. all real numbers B. all nonzero real numbers C. all real numbers except x = 3/4 D. all real numbers except x = - 1 and x = 1

The connecticut river flows at a rate of 4 km/hr for the length of a popular science route. in order for a cruiser to travel 60 km upriver anf then return in a total of 8 hr., how fast must the boat be able to travel in still water?

4 feet 4 feet 3 feet 13 feet How is the base of the cylinder related to the base of the cone?

Which shows all the prime factors for 24?