How do you do adding fraction with the same denominator, no simplifying

Cherie measures and records the lengths and sizes of the same style of a sandal found at a shoe store. which equation can be used to determine the approximate shoe size, s, for a foot length of x inches? s = x – 2 s = 2x – 10 s = x + 6 s = 2x + 4

I’m stuck on this equation, anyone got the answer?

Which of the following represents the factorization of the trinomial below? x^2+7x-30