Solve for j in the proportion.

j
50
=
77
70

j =

Which point lies on a circle with a radius of 5 units and center at p(6, 1)?

An ulcer medication has 300 milligrams in 2 tablets. how many milligrams are in 3 tablets?

Offering 30 if a plus b plus c equals 68 and ab plus bc plus ca equals 1121, where a, b, and c are all prime numbers, find the value of abc. the answer is 1978 but i need an explanation on how to get that.