Find an equation of variation in which the following are true.y varies jointly as x and w and inversely as z, and y = 
when x = 2, w = 4, and z = 56.
A. y = 
B. y = 
C. y = 
D. y = 28xwz
Answer: B
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Use the Montonicity Theorem to find where the function is increasing and where it is decreasing.f(x) = 7x - 5
A. Increasing on 
, decreasing on 
B. Decreasing on (-?,?)
C. Increasing on (-?,?)
D. Increasing on (-?, -5], decreasing on [-5, ?)
The growth rate G, in millions per year, of a certain population depends on the number N, in millions, of individuals present. The relationship is
.
?
What is the maximum growth rate of the population? Round your answer to two decimal places.
?
A. 1.29 million per year B. 0.49 million per year C. 0.86 million per year D. 0.15 million per year
Decide if the set is finite.{x?x is a 12-headed lizard}
A. Finite B. Infinite
Solve the system using elimination.
A. no solution B. all ordered pairs that solve -5x - 4y = 2 C. (10, 8) D. (-10, -8)