Simplify the polynomial expression. 3x(-2x+7)-5(x-1)(4x-3) a. 14x^2-14x+15 b. -26x^2+21x-15 c. -26x^2+56x-15 d. -2x^2+14x-2

Nikolas calculated the volume of the prism. his work is shown below.

Solve the problem by making up an equation. a man could arrive on time for an appointment if he drove the car at 40 mph; however, since he left the house 15 minutes late, he drove the car at 50 mph and arrive 3 minutes early for the appointment. how far from his house was his appointment?

3.4a=57.8 what is the the value of a