Two cars are approaching an intersection. One is 1 mile south of the intersection and is moving at a constant speed of 40 miles per hour. At the same time, the other car is 2 miles east of the intersectionand is moving at a constant speed of 10 miles per hour.
(a) Express the distance d between the cars as a function of timet. (Hint: At t=0, the cars are 1 mile south and 2 miles east of the intersection, respectively.)
d =

Barbara's piano instructors house is 7 1/8 miles from her house. after biking for 1 3/4 miles she stops to rest how much longer does she need to bike to reach her instructor's house

Find the coordinates of point x that lies along the directed line segment from y(-8, 8) to t(-15, -13) and partitions the segment in the ratio of 5: 2.

Given the system of equations presented here: 2x + 4y = 14 4x + y = 20 which of the following actions creates an equivalent system such that, when combined with the other equation, one of the variables is eliminated? multiply the second equation by â’4 to get â’16x â’ 4y = â’80 multiply the second equation by â’1 to get â’4x â’ y = â’20 multiply the first equation by 2 to get 4x + 8y = 28 multiply the first equation by â’1 to get â’2x â’ 4y = â’14