What's 2+2? what's the meaning of life?

4+6x-3x^3 in standard form with explanations because i don’t understand

Solve the inequality and graph 6j - 7 < 5

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.