Solve this system of equations using the elimination method.
-x - 7y=9
-x+9y=-23

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

Will give brainliest series to sigma notation write the following series in sigma notation. 6+10+14+18+22+26+30 example image shown below.

Will give a: 122 b: 90 c: 48 d: 180