Just wanna check my (f+g)(x) if f(x)=3x-7 and g(x)=x^2+3x-4

Adrawer contains 12 identical white socks, 18 identical black socks and 14 identical brown socks. what is the least number of socks you must choose, without looking, to be certain that you have chosen two socks of the same colour?

1mile equals approximately 1.6 kilometers. which best approximates the number of miles in 6 kilometers?

Monthly water bills for a city have a mean of $108.43 and a standard deviation of $32.09. find the probability that a randomly selected bill will have an amount greater than $155, which the city believes might indicate that someone is wasting water. would a bill that size be considered unusual?