Ineed to "find the indicated values" of each problem and i am very confused. "given f(x)=3x^2+5x and g(x)=7x+3 find f(x)g(x)" could someone explain to me how to do this?

Solve the problem by making up an equation. a man could arrive on time for an appointment if he drove the car at 40 mph; however, since he left the house 15 minutes late, he drove the car at 50 mph and arrive 3 minutes early for the appointment. how far from his house was his appointment?

Megan is making bracelets to sell to earn money for the local animal shelter. it takes her 1/4 hour to pick out all the beads and 1/10 hour to string them.this week, she only has 5 1/4 hours to make bracelets. how many bracelets will megan be able to make?

The percent of change from 12 to 15