The perimeter of the triangle below is LaTeX: 8x-68 x − 6 triangle

Which expression represents the length of LaTeX: QRQ R?

1mile equals approximately 1.6 kilometers. which best approximates the number of miles in 6 kilometers?

If 1/√5+1/√5+1=p+q√r , find the values of p, q and r

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.