How do you simplify 2 (7)(8) i know the answer is 112, i just don't know how

Me because some of question i don’t understand

The graph shows the charges for a health club in a month. make a function table for the input-output values. writes an equation that can be used to find the total charge y for the number of x classes

Rewrite the following quadratic functions in intercept or factored form. show your work. f(x) = 3x^2 - 12