1.5 of 30. I need help. Can someone help me on this problem?

Can (3,5 and square root 34) be sides on a right triangle?

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

Which equation shows the variable terms isolated on one side and the constant terms isolated on the other side for the equation -1/2x+3=4-1/4x? a. -1/4x=1 b. -3/4x=1 c. 7=1/4x d. 7=3/4x