For the school food drive, mr. case's class donated 23 pounds of food, ms. fitzgerald's class donated 17 pounds of food, ms. scoffield's class donated 29 pounds of food, and mr. green's class donated 28 pounds of food. in total, how much food did the four classes donate?
this is for my brother

Graph a triangle (xyz) and reflect it over the line y=x to create triangle x’y’z’. describe the transformation using words. draw a line segment from point x to the reflecting line, and then draw a line segment from point x’ to the reflecting line. what do you notice about the two line segments you drew? do you think you would see the same characteristics if you drew the line segment connecting y with the reflecting line and then y’ with the reflecting line? how do you know?