It would be 4,-25 becuase of in the first place i in and the other imp in cams was the
Answer:

Step-by-step explanation:
Height of the Cylinder= 30 feet
Diameter = 8 feet
Radius= Diameter/2 = 8/2 = 4 feet
The Amount of Metal Sheet used in constructing the tank is the Total Surface Area of the Tank.
Total Surface Area of a Cylinder =

The order does not matter (A,B,C same as B,C,A) so it's a combination 28 choose 5.
I didn't know if you had to show your work or not, so the work is on the paper as well as the answers. I also took two photos just in case you couldn't see something.
1. x = -7
2. x = -2
3. x = -14
4. x = -3
5. x = 4
6. x = -1
7. x = 7