The width of a certain rectangle is 2 less than its length .if it’s perimeter is 96 what is its length

There are 15 plates and each plate is either 7 or 12 inches diameter. which systems of equations do you use to find the number of 7 inch plates, x and 12 inch plates, y

If you could answer these your a life saver

The given diagram shows the parts of a right triangle with an altitude to the hypotenuse. using the two given  measures, find the other four.