Write a system of linear equations that models the situation. Do not solve.A truck is driven for 4 hours, part of the time at 20 miles per hour and the rest of the time at 60 miles per hour. The total distance traveled was 
miles. How long did the truck travel at each speed?
A. x + y = 4
20x + 60y = 200
B. x + y = 200
20x + 60y = 4
C. x - y = 4
20x - 60y = 200
D. x + y = 40
60x + 20y = 200
Answer: A
Mathematics
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