Answer:
Step-by-step explanation:
D(15) = 3500 -20(15)
D(15) = 3500 - 300
D(15) = 3200
In 15 hours of driving the Brown family is 3200(no unit given) away from home.
The expression is equal to one. Because a number over the same number is equal to one. I think that is the answer.
Hope this helps!
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