Factorise fully the following:
a) 2x + 10
b) 5x – 15
c) 8x + 6
d) 12x - 8

The volume of gas a balloon can hold varies directly as the cube of its radius. imagine a balloon with a radius of 3 inches can hold 81 cubic inches of gas. how many cubic inches of gas must be released to reduce the radius down to 2 inches?

What are the solutions of the system? y = x^2 + 2x +3y = 4x - 2a. (-1, -6) and (-3, -14)b. (-1, 10) and (3, -6)c. no solutiond. (-1, -6) and (3, 10)

Micheal is 4 times as old as brandon and is also 27 years older than brandon. how old is micheal