Find the value of x, round to nearest degree. (sines and cosines)

Write numerical coefficient of y² in the expression 2x² - 15xy – 7y²

(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.

What value is a discontinuity of x squared plus 8 x plus 4, all over x squared minus x minus 6?