What two numbers at to 1 and multiply to 12

You need to solve a system of equations. you decide to use the elimination method. which of these is not allowed? 3x - 2y = 7 3x + 4y = 17 equation 1 equation 2

Let f(x) = 5/x and g(x)=2x2+5x. what two numbers are not in the domain of f o g

In an equilateral triangle, each angle is represented by 5y+3. what is the value of y? a. 9.7 b. 10.8 c. 11.4 d. 7.2