The height of a wave in California varies directly with the seconds that pass by. At 4 seconds, the wave is 6 feet high. Find the constant of the variation. (do not use spaces in your answer; fractions should be in simplest form; use the / for your fraction bar)

Tony is charged $ 50 and additional $0.15 per miles for renting a car. a) represent the cost of renting a car with an equation, and the determine the cost if he drove it70 miles. b) what would be the cost of a car rental if the car was driven 250 miles? show work

What is the answer to question 11? will give extra points! include a explanation (reasonable) for you : )

The bottom of a vase is a square. each side measury y+11 units. the square has a perimeter of 55 units what is the value of y?