A student has scores of 79, 78, and 82.75 on his first three tests. He needs an average of at least 80 to earn a grade of B. What is the minimum score that the student needs on the fourth test to ensure a B?

In the first triangle 80+20+p=180 (since sum of all angles of a triangle is 180)so p= 80also in second triangle 55+45+q=180 (since sum of all angles of a triangle is 180)so q=80so we can conclude that p=80 degrees q=80 degrees so p=q=80 degreeshence option b is correct

The answer is a good luck