Help me please :(((

Please

Solve the equation using the given values: x= -2.5; y= -7.51. 2xy + 2x²

What is the value of x when x + 7 = 21?

(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.