I need help pleaseee ?

13.

y=-3x²

Step-by-step explanation:

13.

y=ax²+bx+c

0=0+0+c,c=0

so y=ax²+bx

-3=a+b

-12=4a+2b

or -6=2a+b

subtract

-3+6=a+b-2a-b

-a=3

a=-3

-3+b=-3

b=0

y=-3x²

when x=3

y=-3×3²=-27

when x=4

y=-3×4²=-48

whih is true.

answer: the answer is ann

the highest percentage for deaths in construction from highest to lowest is as follows: falls, struck by objects, electrocution, and caught-in/between. these four are collectively known as fatal four.

in the case of falls, the type that is responsible for the overall highest death in the category is falls from roofs.