Find the perimeter of this semi-circle with diameter, d
= 36cm.
Give your answer rounded to 1 DP

Which of the following represents a number squared is equal to twenty more than nine times that number ? a) x squared = 9x + 20 b) x squared = 20x + 9 c) x squared > 9 + 20x d) x squared = 9 + x + 20

For the equations below which statement is true ? -2x=14 6x=-42

Name each raycalculation tip: in ray "ab", a is the endpoint of the ray.