hey what is the equation to finding ur final grade?if ur final is worth 5%?

Answer 1

(final exam mark * 0.05) + (final class mark * 0.95) = final grade

e.g.: Final exam mark, final class mark, 80 and 90 (don't use decimals)
So you get
(80 * 0.05) + (90 * 0.95) = final grade = 89.5%

Answer 2

Let X = grade before final
Let F = final exam grade
Grade = 0.95 * X + 0.05 * F
Example
grade before final = 79
final exam grade = 86
Grade = 0.95 * 79 + 0.05 * 86
Grade = 75.05 + 4.30 = 79.35