Solve the problem.The system of equations 
= (-7 + 8y)x and 
= (-7 + x)y describes the growth rates of two symbiotic (dependent) species of animals (such as the rhinoceros and a type of bird which eats insects from its back). What is necessarily true of the two populations at the equilibrium points?
A. They are both at a minimum.
B. They both remain constant over all time.
C. They are both at a maximum.
D. Both populations equal zero.
Answer: B
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Find the equation for the plane tangent to the parametrized surface S at the point P.S is the sphere r(?, ?) = 2 cos ? sin ?i + 2 sin ? sin ?j + 2 cos ?k; P is the point corresponding to 
What will be an ideal response?
Subtract. Combine like terms, and write the answer in descending order.(-9b2 + 1) - (-b3 - 7b2 + 3)
A. b3 - 2b2 - 2 B. b3 - 16b2 + 4 C. -8b3 - 6b2 - 3 D. -8b3 - 7b2 - 2
Identify the multiplication model that best fits the problem. Do not solve the problem.How many 3-digit numbers can be formed using the digits 0, 1, 2, 3, 4, 5, 6, if repetitions are not allowed?
A. Cartesian product model B. Measurement model C. Set model D. Array model
Find the nth, or general, term for the geometric sequence.1, 
, 
, ...
A. an = 
B. an = 
C. an = 
D. an = 1 - 
n