Two angles are vertical angles. One angle is labeled 2x degree. The other angle is labeled (x + 30) degrees. Find the value of x.

According to statistics a person will devote 32 years to sleeping and watching tv. the number of years sleeping will exceed the number of years watching tv by 18. over a lifetime, how many years will the person spend on each of these activities

Why do interests rates on loans to be lower in a weak economy than in a strong one

If f(x)=2x-6 and g(x)=3x+9, find (f-g)(x)