For the pair of functions, fand g, find (fog)(x) and (gºn (x)
f(x) = 3 + x, g(x) = x2 + 1

Julius sold five times as many computers as sam sold last year. in total, they sold 78 computers. how many computers did julius sell?

Which one ? is the answer and how to find this answer

What is the expression in factored form? -x^2 + 3x + 28 a. (x-7)(x-4) b. -(x-7)(x+4) c. (x+4)(x+7) d. -(x-4)(x+7)