Simplify the expression. justify each step with a property: 12x + (7x + 9x) + 13x

If f(x)=x+7 and g(x)=1/x what is (fog)(x)

The number of calories you burn depends on your weight. a 110-pound person burns 163 calories during 30 minutes of tennis. find the number of calories that a 190-pound person would burn during the same activity, assuming they burn calories at the same rate.

Can someone me with this graph problem by the way i need to know the answers by today since this assignment is due ! !