I need help with this !

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

Starting at home, emily traveled uphill to the hardware store for 606060 minutes at just 666 mph. she then traveled back home along the same path downhill at a speed of 121212 mph. what is her average speed for the entire trip from home to the hardware store and back?

What is the value of x in the equation7x+2y=48 when y=3