Write an equation to describe the variation. Use k for the constant of proportionality.w varies jointly as x and y.
A. w + x + y = k
B. w = k + x + y
C. w = kxy
D. wxy = k
Answer: C
You might also like to view...
Use a graphing utility to graph the function over the indicated interval and approximate any local maxima and local minima. If necessary, round answers to two decimal places.f(x) = x4 - 5x3 + 3x2 + 9x - 3; (-5, 5)
A. local minimum at (-3, -3) local maximum at (-1.32, 5.64) local minimum at (0.57, -6.12) B. local minimum at (-0.57, -6.12) local maximum at (1.32, 5.64) local minimum at (3, -3) C. local minimum at (-0.61, -5.64) local maximum at (1.41, 6.12) local minimum at (3, -3) D. local minimum at (-1, -6) local maximum at (1, 6) local minimum at (3, -3)
A deck of cards contains 52 cards. These cards consist of four suits (hearts, spades, clubs, and diamonds) of each of the following: 2, 3, 4, 5, 6, 7, 8, 9, 10, jack, queen, king, and ace. If a card is chosen from a deck of cards, find the probability of each event.Selecting the queen of spades
A. 
B. 
C. 
D. 
Solve the exponential equation. Use a calculator to obtain a decimal approximation, correct to two decimal places, for the solution.37x = 3.3
A. 5.85 B. 7.61 C. 0.16 D. 0.20
Use the given information to answer the question.The number N, in millions of Americans of age x with arthritis, is estimated with the following graph. 
Approximately how many 40-year-olds and 55-year-olds combined have arthritis?
A. 31,400,000 B. 400,000 C. 4,100,000 D. 3,600,000