A married couple had a combined annual income of $81,000. The wife made $9000 more than her husband. What was each of their incomes?

What numbers are included in the set of integers? what numbers are not included?

Acircle has a circumference of 7.850 units. what is its radius?

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