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

Find the solution to this system 2,1 1,-2 1,2 -1,2

Pranav and molly are selling pies for a school fundraiser. customers can buy blueberry pies and pumpkin pies. pranav sold 6 blueberry pies and 4 pumpkin pies for a total of $106. molly sold 6 blueberry pies and 3 pumpkin pies for a total of $90. find the cost of each of one blueberry pie and one pumpkin pie