I really need help on #21 a-c thanks. :)
assuming that the order is ok so distance from greenvile to parker=29distance from greenvile to hadley=?distance from hadley to greenvile is 12 and 1/2 less than distance between parker and greenvile means?=-12 and 1/2+29add-12 and 1/2+29=6 and 1/2?=6 and 1/2 miles