9 + 1/2(7n + - 26) - 8n Please help me simplify!

Which number produces a rationale number when multiplied by 1/5

Find the equation of the line with slope =8 and passing through (6,53) write your equation in the form y=mx+b

(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.