If f(x) = 5x + 40, what is f(x) when x=-5?

Which of the symbols correctly relates the two numbers below check all that apply 6? 6

If the ratio of sum of the first m and n terms of an ap is m2 : n2 , show that the ratio of its mth and nth terms is (2m − 1) : (2n − 1).

Determine if the solution set for the system of equations shown is the empty set, contains one point or is infinite. x + y = 5 x + y = 7 {} 1 solution infinite