In one class homework is worth 55% of the final grade, each of 3 projects is worth 10% and a final exam is worth 15%

Question

A. If a student has an 84 homework average and a 93 on the first project, what is the students grade at this point.

B. If a student gets a 78 on the second project and a 74 on the third project what is the lowest grade the student can get on the final exam to get an 80 overall in the course?

Answer 1

grade = 0.55H + 0.10(P₁+P₂+P₃) + 0.15E

so just put in the numbers; in question A, you may not have the grade (variable E) yet, so you can either guess or wait!

 

Similarly, in question B, you have the three P-scores and the H=84, so treat the formula as an inequality: grade =

should be replaced by 80 ≤ and then solve for E, the final exam score required to get grade above or equal to 80.