WHAT WOULD THIS BE

Present age of man is 45 years, 5 years back his age was 4 times age of his son what is present age of his son?

Javier bought a painting for $150. each year, the painting's value increases by a factor of 1.15. which expression gives the painting's value after 77 years?

Factor these polynomials and explain how 1. 12x - 3x^2 2. 20 - 240x^2