Factorise by first completing the square.
a) x^2 + 2x - 2
b) x^2 - 10x + 12
c) x^2 + 6x - 10
d) x^2 + 16x - 1
e) x^2 - 14x + 43
g) x^2 + 8x + 9
h) x^2 - 4x - 13
i) x^2 - 12x + 25

Suppose a ball is dropped fromca height of 6ft. it bounces back up but time it bounces, it reaches only 7/10 of its pervious height. what is the total of each height that the ball reaches after 5 bounces

How many glue sticks are in a basket containing 96 scissors, if the ratio of glue sticks to scissors is 19 to 57.

Find an equation of the line perpendicular to the graph of 28x-7y=9 that passes through the point at (4,1)