Two terms of an arithmetic sequence are a6= 40 and a20= -16. write and explicit rule for the nth term

Asailor is looking at a kite. if he is looking at the kite at an angle of elevation of 36and the distance from the boat to the point where the kite is directly overhead is 40 feet, how high is the kite?

Factor the expression using gcf 9b+45

The graph represents f(x)=[x]+3. what is f(-2.2)?