Chau’s score would be 19.
6, -4, 2
You can get this by factoring the trinomial and setting each part, along with x-6, equal to 0. The trinomial can be factored to (x+4)(x-2)
A^2 + b^2 = c^2
7^2 + 4^2 = 65
square root of 65 is 8.06
answer: 8.06
Answer:

Step-by-step explanation:
If a third drop out, Initial fraction of those who graduate = 
Three-fifths of those who dropped out(one third) eventually return = 
The proportion of students entering high school who eventually graduate
= Those who graduated Initially+Those who returned
=
How can you find the sum when your multiplyin? I can try and help tho