P(50)=-0.4(50)2+80(50)-1600

Solution for P(50)=-0.4(50)2+80(50)-1600 equation:

Simplifying
P(50) = -0.4(50) * 2 + 80(50) + -1600

Reorder the terms for easier multiplication:
50P = -0.4(50) * 2 + 80(50) + -1600

Multiply -0.4 * 50
50P = -20 * 2 + 80(50) + -1600

Multiply -20 * 2
50P = -40 + 80(50) + -1600

Multiply 80 * 50
50P = -40 + 4000 + -1600

Combine like terms: -40 + 4000 = 3960
50P = 3960 + -1600

Combine like terms: 3960 + -1600 = 2360
50P = 2360

Solving
50P = 2360

Solving for variable 'P'.

Move all terms containing P to the left, all other terms to the right.

Divide each side by '50'.
P = 47.2

Simplifying
P = 47.2