Afenced-in rectangular area has a perimeter of 40 ft. the fence has a post every 5 ft.

how many posts are there?
what is the length and width of the area?
are there any other possible answers to the above question? if so, what are they?

Does the problem involve permutations or? combinations? do not solve. the matching section of an exam has 4 questions and 7 possible answers. in how many different ways can a student answer the 4 ? questions, if none of the answer choices can be? repeated?

What is the y-intercept of the line given by the equation

20 solve 2(4 x + 3) < 5 x + 21. a) { x | x < 9} b) { x | x > -5} c) { x | x > -9} d) { x | x < 5}