Find the sum of the finite arithmetic sequence.
Sum of the integers from −40 to 50

Write a function that matches the description. a cosine function has a maximum of 5 and a minimum value of -5. f (r) =

The inside wheels of a car traveling on a circular path are rotating half as fast as the outside wheels. the front two wheels are six feet apart. what is the number of feet in the path traced by the inside front wheel in one trip around the circle? express your answer in the form "k \pi", where k is an integer.

Ahiker stands at an unknown elevation before he ascends 2 miles up a mountain to an elevation of 9 miles. find the elevation of the hiker before his ascent.