Acircle has a diameter with endpoints at 5 + 18i and –3 + 2i. what is the center of the circle? –11 –16i 1 + 10i 2 + 20i 4 + 8i

If 10 men take 18 days to mow 60 acres of grass, how long will 15 men take to mow 80 acres?

Joe has a rectangular chicken coop. the length of the coop is 4 feet less than twice the width. the area of the chicken coop is 510 square feet. what is the length of the chicken coup?

Ateacher wanted to buy a chair, a bookshelf, two tables and a desk. she spent $900 for all five items and the chair and the desk combined 70% of her total. if the bookshelf cost $50, how much did each of the tables cost?