Subtract 5a-6b+7c from 13a-4b+8c

What is the perimeter of a rectangular building that is 80 feet wide and 140 feet deep?

Find the magnitude, correct to two decimal places, made by each of the following with positive direction of the x axis a) y= x the answer is 45° but i don’t know how

Patty made a name tag in the shape of a parallelogram. reilly made a rectangular name tag with the same base and height. explain how the areas of the name tags compare.