Which of the following is(are) the solution(s) to 15x +21= 8?

Question 101 points)which equation in slope-intercept form represents the line that passes through (5, 1) and(-4,7)

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.

Need on this one asap im almost done with this subject