Evaluate f(x) = -2x square root -4 for x=3

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.

Asap its important using the information in the customer order, determine the length and width of the garden. enter the dimensions.length: feetwidth: feet

What is the solution to the system of equation graphed belowa.(0,-4)b.(2,5),1),-3)