Joesphine scored 95, 84, and 87 on three math tests. She wants her average score for 5 tests to be at least 90.
Part A: What are two possible test grades she could get to reach her goal? Justify your reasoning.
Part B: What are the two lowest grades she could get and still get at least a 90 average? Prove your result.
I am very confused. Please help...

The answer for part B is I think 92 and 92. And for part A she could get 97 and 97 as the test average would be 92.

Step-by-step explanation:

I kinda explained it in the answer yeah but I hope that helps.

place r′ so that qr′ is parallel to the tangent.

now we get that ∠r′py=∠pr′q, where y is on the tangent, on the opposite side of p from x.

also, because of the symmetry, ∠r′py=∠qpx.

finally, note that no matter where we place r, as long as it's on the correct arc, we have ∠prq=∠pr′q.

stringing all these equalities together, we end up with ∠prq=∠qpx.

this picture will show how its going to look like.

hope this by jack monhen