suppose that f(m) = m2+18m+72. Solve f(m)=0

Find all possible pairs of integers x, y so that 7x + 3y = 4. Then find which of these pairs makes the quantity (12x + 5y)^2 as small as possible.

8. Solve: 35x³(x² - 25) (4x - 16) ≤ 0

The average monthly bill for wireless telephone subscribers from 1985 to 2008 can be modeled by B(x) = -1.263x + 95.942, where x is the number of years after 1980. If this model remains valid, in what year will the average monthly bill be $46.69? The average monthly wireless phone bill would be $46.69 in the year (Do not round until the final answer. Then round to the nearest whole number as needed.)