Please help, i need A, B & E

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

Find the average rate of change for f(x) = x2 − 3x − 10 from x = −5 to x = 10.

Use the distance formula to find the distance between (-3,5) and (3,1)