As far as I know, only the first part can be answered, but even then it's incomplete...
The equation for the Area of the sheet is A = 12 * 8.
I honestly have no clue as to what you meant by 'find the zeros and sketch the function,' sorry.
Answer:
x = - 15
Step-by-step explanation:
The equation is 
We now cross mulitply and do algebra to figure the value of x (shown below):

Hence x = -15
Use the formula for the volume of a triangular pyramid: V=13Ah , where A = area of the triangular base, and H = height of the pyramid.
the answer to 1/3 times 3/4 is 1/4
Answer: y=-3
Step-by-step explanation:
- 3y - 7=5y + 17
-7=8y+17
8y=-24
y=-3