Y varies inversely with x. If y = 13 and k (the constant of variation) = 156, what is x? Round to the nearest whole number, if necessary.

 12

Step-by-step explanation:

The formula for "varies inversely" is: xy = k

Given: y = 13, k = 156

                 x(13) = 156

                 x      = 156/13

                 x      = 12

x² + 3x + 7 = 0       [ax² + bx + c]

a = 1

b = 3

c = 7

quadratic formula:

    (+/- is this ±)

plug in the numbers into the variables

your answer is a