While studying the elk population, Dr. Gregory and her research assistants marked 42 elk. Later, they flew over the area and counted 200 elk, of which 15 were marked. To the nearest whole number, what is the best estimate for the elk population?
Based on the given conditions, formulate: If the fraction is defined, the denominator cannot equal 0.: Append the inequality as the domain: Reduce the fraction: Multiply both sides of the equation by the common denominator: Reduce the fractions: Swap the sides: Divide both sides of the equation by the coefficient of variable: Cross out the common factor: Find the intersection: get the result: Answer: x=560
