To find an area of a triangle you do 1/2 x base x height.
Use the pythagorean theorem. You should come out with C. Hope this helps!
I need a little more to work with
2x^2 - 11 = 87
2x^2 = 87 + 11 = 98
x^2 = 98/2 = 49
x = sqrt (49) = + or - 7
Answer:42x
Step-by-step explanation:
