4x+12y into a distributive property

pls help ill mark u

Ineed with number 6 , explain how to get 1978

What is the value of f(x) = 2.2 for f(-2)?

(c) the diagram shows the first three shapes of a matchsticks arrangement.first shape = 3second shape = 5third shape = 7given m represents the number of matchstick used to arrange the n'th shape.(i) write a formula to represent the relation between m and n. express m as the subjectof the formula.(ii) 19 matchsticks are used to make the p'th shape. find the value of p.