Find the value of X x-5=7

The two square pyramids are similar. find the total volume of both pyramids if the ratio of their surface areas is 9/16

What is the circumference of a circle with an area of 50.24 cm²?

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?