86 and 87 utilize the Pythagorean theorem. Where those tangent lines meet the circle forms a right angle. So you have a side length of 6 and a hypotenuse of 22. So the missing side length is 21.16. For 87, its the same thing, but you have the 2 legs but are missing the hypotenuse.
Option (c) is correct according to me I think it’s helpful
the answer for this question is (B) 5,-2
Yes, because there is a corresponding amount of teachers per student.
