Help me Guess just help please

I'm so close to finishing all these.

Xto the second power plus 14x plus 48. what are the factors? we are doing factoring trinomials with a=1

Type the correct answer in the box. consider the system of linear equations below. rewrite one of the two equations above in the form ax + by = c, where a, b, and c are constants, so that the sum of the new equation and the unchanged equation from the original system results in an equation in one variable.