Write the quadratic function in vertex form. y = x2 + 8x + 18 (50 points for )
A. y = (x - 4)2 - 2
B. y = (x - 4)2 + 2
C. y = (x + 4)2 - 2
D. y = (x + 4)2 + 2

The diagram shows a 7cm by 6cm rectangle based pyramid. all the diagonal sides - ta, tb, tc and td are length 10cm. m is midpoint of rectangular base. work out height mt to 1 decimal place

Some boys and girls were asked if they had a pet. one third of the group were boys. there were 20 boys. 20% of the girls had a pet. boys with a pet : girls with a pet = 1 : 5 i need to know how many girls there are.

Rewrite the following quadratic functions in intercept or factored form. show your work. f(x) = 3x^2 - 12