What is the area of the triangle formed from (0, -1), (0, 4), and (4, -1)?

What value of x is in the solution set of –5x – 15 > 10 + 20x?

Which of the following is true for the relation f(x)=2x^2+1

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.