In the diagram, AD= CD = CB and A=40. how many degrees are in BCA

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 sum of 4x^{2} -4+6 and -7^{2} +3x+1

Kylie explained that (-4x+9)^2 will result in a difference of squares because (-4x+9)^2 (-4x+9)^2 =(-4x)^2+(9)^2=16x^2+81