If P (Q) = 0.49, P (R) = 0.44, and P (Q intersection R) = 0.36 find P (Q union R)

If x=-3 is the only x-intercept of the graph of a quadratic equation, which statement best discribes the discriminant of the equation?

Twice the sum of a number and 4 is equal to three times the difference of the number and 7. find the number.

One positive number is 9 more than twice another. if their product is 95, find the numbers