The answer is B :)
Hope this helped :)
Answer: Isolate the variable by dividing each side by factors that don't contain the variable.
x= -7, -9
There are 12 inches in a feet, so there are 1200 inches. 1200 inches is more than 100 inches, so there is more.
Answer:

Step-by-step explanation:
To solve this problem we need to be familiar with the formula for the surface area of a cone:

We are given the length of a side and the diameter, to calculate the radius divide the diameter in half:

To calculate the height of the cone, we must use the Pythagorean Theorem:

We can treat the side length as the hypotenuse
, the radius as the base
, and solve for height
. Set the expression up like this:

Now we can plug into our original formula:

10,11,15 is not right triangle
30,40,50 is right triangle
9,13,16 is not right angel
16,30,34 is right triangle