y varies directly with t and the square of x. When x 4 and t 1, then y 8. Find an
Chapter 3, Problem 56(choose chapter or problem)
y varies directly with t and the square of x. When x 4 and t 1, then y 8. Find an equation that describes this variation. Solution: Write the variation equation. Let x 4, t 1, and y 8. Solve for k. Substitute k 4 into . This is incorrect. What mistake was made? y = kt
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