Which expression is equivalent to 10x^6y^12/-5x^-2y^-6?

a) -50x^8y^18
b)-2x^8y^18
c) -2x^12y^72
d)5x^8y^18

F(x)=x/2-2 and g(x)=2x^2+x-3 find (f+g)(x)

Aportion of a hiking trail slopes downward at about an 84° angle. to the nearest tenth of a flot, what is the value of x, the distance the hiker traveled along the path, if he has traveled a horizontal distance of 120 feet? a. 143.3 b. 12.5 c. 120.7 d. 130.2

Can someone me with these two circle theorem questions asap?