Figure abcd is a parallelogram.

what is the perimeter of abcd?

What is the solution of the systems of equations? y=2/3x+3 x=-2

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.

The length of a rectangular piece of land is 92 yards more than three times its width. the perimeter is 760 yards. find its dimensions.