Linear Equation: y = 5x + 5 No links please!

Me. i can't figure out this question. give an explanation too. .

Given ab and cb are tangents of p, and m =10°. what is the measure of abp?

Astudent must have an average on five test that is greater than it equal to 80% but less than 90% to receive a final grade of b. devon's greades on the first four test were 78% 62% 91% and 80% what range if grades on the fifth test would give him a b in the course? ( assuming the highest grade is 100%)