21 fewer stars than 3 times a number h

The table represents a function f(x). what is f(3)? a.-9 b.-1 c.1 d.9

Me! i really need to get this right before 9. prove the divisibility of 7^6+7^5-7^4 by 11. use factoring so you get a number times 11. just tell me the number. i need this done asap

The surface area of the triangular prism is .