Distribute and combine like terms for 3-2(x+4)

I need the answer within the next half hour.

Volume of cylinder with a radius of 8cm and height of 25 cm

How many triangles can be drawn with side lengths 4 centimeters, 4.5 centimeters, and 9 centimeters? explain

Evaluate the discriminant of each equation. tell how many solutions each equation has and whether the solutions are real or imaginary. x^2 - 4x - 5 = 0