Solve the problem.Three trains - one eastbound, one westbound, and one northbound - leave a city at the same time. The speed of the northbound train is 30 miles per hour greater than the speed of the eastbound train. After 3 hours, the distance between the westbound train and the eastbound train is 210 miles. Twice the speed of the westbound train is 20 miles per hour more than the speed of the northbound train. Find the speeds of the three trains.
A. eastbound, 20 mph; westbound, 50 mph; northbound, 60 mph
B. eastbound, 60 mph; westbound, 40 mph; northbound, 30 mph
C. eastbound, 30 mph; westbound, 40 mph; northbound, 60 mph
D. eastbound, 40 mph; westbound, 40 mph; northbound, 70 mph
Answer: C
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A. vertex (2, 1)
intercepts (1, 0), (3, 0), (0, -3)
B. vertex (-2, 1)
intercepts (-1, 0), (- 3, 0), (0, -3)
C. vertex (2, -1)
intercepts (1, 0), (3, 0), (0, 3)
D. vertex (-2, -1)
intercepts (-1, 0), (- 3, 0), (0, 3)
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A. $56,480 B. $59,176 C. $64,317 D. $63,540
Provide an appropriate response.Consider the following figure, which is a square divided into two squares and two rectangles.
The length of each side of the large square is x + 9. Use the formula for the area of a square to write the area of the largest square as a power.
A. x2 + 92 B. (x - 9)2 C. x2 - 92 D. (x + 9)2
Identify the polygon as a triangle, quadrilateral, pentagon, hexagon, or octagon.
A. triangle B. quadrilateral C. octagon D. pentagon