What is the slope of the line 3y + 9 = x?

the best explanation gets to be brainliest (:

If f(x)=2x+2and g(x)=x^3, what is (g•f)(2)

How long must $542 be invested at a rate of 7% to earn $303.52 in interest? in a easier way

In a two-digit number the units' digit is 7 more than the tens' digit. the number with digits reversed is three times as large as the sum of the original number and the two digits. find the number.