Flying against the wind, an airplane travels 8080 kilometers in 8 hours. Flying with the wind, the same plane travels 9030 kilometers in 7 hours. What is the rate of the plane in still air and what is the rate of the wind

Nine more than four times a number is the same as one less than twice the number. find the number?

Dakota earned $7.50 in interest in account a and $18.75 in interest in account b after 15 months. if the simple interest rate is 4% for account a and 5% for account b, which account has the greater principal? explain. to make it a little easier, there is an image. good luck!

The radius of a sphere is 3 inches. which represents the volume of the sphere?