The scale of a model train is 1 inch to 15.5 feet. One of the cars of the model train is 4 inches long. What is the length, in f
1 answer:
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Answer: x = 20.
Step-by-step explanation:
x and (3x + 10) combine to form a right angle, shown in the diagram by the small square joining the perpendicular lines.
Right angles are 90 degrees, so you can add both angles to get 90: