What equation can be used to solve for x in the following diagram?

HELP ASAP

C

Step-by-step explanation:

If you look at the two angles, one is 7x and the other is 11x, they appear to be next to each other and make a right angle, if you look at the bottom corner of them there is a square which means it is a right angle. this means that if you put 7x with 11x it would = 90

step-by-step explanation:

1. the cylinder is a. 54

2.   a.108 /

or

step-by-step explanation:

we need to solve for 'x' the following equation:  

we have that:

⇒

⇒ ⇒

factorizing, we get that:

  ⇒

then, the solutions are: or

nothing extraneous has been found!