Why is a 1 written next to the 2 from 9−7?

Which statement accurately explains whether a reflection over the x-axis and a 180° rotation would map figure acb onto itself?

Daniel expanded the expression as shown below -2(-8x-4y+3/4)=-10x-8y-11/4 what errors did he make? check all that apply

The lengths of all sides of a triangle are integers when measured in decimeters. one of the sides has length of 1 dm and another of 3 dm. find the perimeter of the triangle.'