A train travels 200 miles in 4 hours at a constant rate. What is the constant rate of change for the train in miles per hour? A.
2 answers:
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we have
Complete the square. Remember to balance the equation by adding the same constants to each side
Rewrite as perfect squares
remember that
Square root both sides
Simplify
therefore
<u>the answer is</u>
Answer:
if u substitute the givens in the eqn we will get..
then collect like terms