Need help with this. Please don't answer if you're not sure thanks!

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 reflexive property of congruence lets you say that ∠pqr ≅

Rewrite the following quadratic functions in intercept or factored form. show your work. y = 4x^2 - 19x- 5