Which equation is the direct variation equation if f(x) varies directly with x and f(x)=-18 when x=3

Evaluate the discriminant of each equation. tell how many solutions each equation has and whether the solutions are real or imaginary. 4x^2 + 20x + 25 = 0

Jack is considering a list of features and fees for current bank: jack plans on using network atms about 4 times per month. what would be jack’s total estimated annual fees for a checking account with direct paycheck deposit, one overdraft per year, and no 2nd copies of statements? a. $44 b. $104 c. $144 d. $176

Angles 1 and 2 are complimentary angles. angle 1 = 52 degrees. what is the measure of angle 2?