Asmall company has a fleet of 7 pickup trucks and 5 delivery vans. a larger company has the same ratio of pickup trucks to delivery vans. if the larger company has 84 pickup trucks, how many delivery vans does it have?

Afarmer has a large field that is x feet in length. he wants to fence in a rectangular section in the middle of the field , leaving a length of 100 feet of open field behind each end of the fenced rectangle.he also wants the width of the fenced-in space to be 100 feet less than its length. find the expressions to represent the length and width of the fenced section of the field