If you reflect any shape across the x-axis and then across the y-axis, do you get the same result that you would if you rotated it 180° about the origin? what does that mean?

Yes, it has the same result

look at the picture. the red triangle is the first image. the green one is the result of reflecting over x-axis. then if you reflect it over y-axis, it would be the purple triangle

if you had rotated the red triangle at first, it would have the same result

good luck

The equation is  125+22m=b