Select all equations where x = 4 is a solution

The center of the circumscribed circle lies on line segment and the longest side of the triangle is equal to the of the circle.

What is always true when two whole numbers are subtracted?

(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.