Rectangle base of length 3x cm and width x cm, where x>0. the height is y cm, where y>0. The sum of the length, width and height is 20 cm. what is the expression for y terms.​

What is the value of r of the geometric series?

Is this a polynomial function? i need to know asap

Aremote-controlled boat can travel at 4 feet per second in calm water. the boat traveled 48 feet with the current, and then it traveled 16 feet against the current in the same amount of time. how fast is the current?