What is the approximate volume of the pyramid?

For f(x)=2x+1 and g(x)= x^2 -7, find (f•g)(x)

An appliance store sells lamps at $95.00 for two. a department store sells similar lamps at 5 for $250.00. which store sells at a better rate

Two times a number plus three times another number equals 4. three times the first number plus four times the other number is 7. find the numbers