exam Maths Puzzle Numerical Ability

How much greater is the product of -3,-7, and 5 than their sum.

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exam Other Question

Show a graph of y=f(x) and y=(g)x. Express the function g in terms of f. This one is hard but I gave it my best shot with, g(x)=2-f(x-2) is this right. Thanks for the help. Can someone help me solve this problem?

I need to find the median of:

22, 15, 21, 37, 27

Thank you!
Ashley