What is the approximate solution of this system of equations y=2^x and y=3x

The sum of these consecutive integers is equal to 9 less than 4 times the least of the integer. find the three integers

Atown has a population of 12000 and grows at 3.5% every year. what will be the population after 7 years, to the nearest whole number?

The mass of a marine organism, in pounds, p years after it is born is given by the polynomial function r(p) = -4p2 + 300p. find the mass when p = 20 years.