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The length of a wave varies jointly with the wavelength and the frequency of the wave. If the speed of a wave is 20 feet per second, its wavelength is 50 feet and its frequency is 0.4 waves per second. What is the speed of a wave whose wavelength is 1 foot and whose...

The area of a kite varies jointly with the lengths of its two diagonals. If a kite with an area of 30 inches, 2 has one diagonal of length 10 inches and the other diagonal of length 6 inches, what is the area of a kite with diagonals of length, 8 inches and 13 inches?

A small company produces both bouquets and wreaths of dried flowers. The bouquets take 1 hour of labor to produce, and the wreaths take 2 hours. The labor available is limited to 80 hours per week, and the total production capacity is 60 items per week. Write a system...