The length of a rectangle is twice its width. The perimeter is 48 in. Find the dimensions of the rectangle. Please only answer if you have taken algebra and tell me the formula please for this equation

Find x to the nearest hundredth place

Ascientist has 50 grams of a radioactive element. the amount of radioactive element remaining after t days can be determined using the equation (1) after two days the scientist receives a second shipment of 50 grams of the same element. the equation used to represent the amount of shipment 2 remaining after t days is 10) - 50 which of the following is an equivalent form of the expression for the amount remaining in shipment 2? what’s the answer?

Which is the value of this expression when p=3 and q=-9