We are given
Staples sells pencils in packs of 12 pencils for 3.50
so, staples cost is
per pencil
per pencil
Office max sells pencils in packs of 15 pencils for 6.50
so, office max cost is
per pencil
per pencil
now, we can find their differences
per pencil
per pencil............Answer
Answers and explanations:
87. The domain of added functions includes the restrictions of both. So the range of the added function in this question is [-4, 3]
88. When finding the domain of a divided function we do the same as adding, but with an extra rule: g can't equal zero. So for this question the domain is (-4, 3)
89. To graph f + g you add the y-values for each x-value. I added a picture to help explain this one!
