Please help and thank you

Which transformations could have occurred to map △abc to △a"b"c"? a rotation and a reflection a translation and a dilation a reflection and a dilation a dilation and a rotation

Select all of the quadrants that the parabola whose equation is y=√x-4 (principal square root) occupies. i ii iii iv

If (x-2) 2= 49, then x could be a. -9 b. -7 c.- 2 d. 5 e.9