Factor out the GCF from the polynomial.20x4y + 36xy3
A. 4y(5x4 + 9xy2)
B. 4xy(5x3 + 9y2)
C. 4x(5x3y + 9y3)
D. xy(20x3 + 36y2)
Answer: B
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Describe the largest set S on which it is correct to say that f is continuous.f(x, y, z) = 
A. {(x, y, z): x2 + y2 ? 7} B. {(x, y, z): x2 + y2 ? 49} C. Entire plane D. {(x, y, z): x2 + y2 ? 0}
Model the situation with a dynamical system. Use your model to answer the question.You take a 259-mg dose of an antibiotic every 5 hours. Your body eliminates 44% of the drug in a 
period. How much antibiotic will be in your bloodstream after two doses?
A. Dn+1 = 0.56Dn + 259, n = 0, 1, 2, ..., where D0 = 0; 404.04 mg B. Dn+1 = 56Dn + 259, n = 0, 1, 2, ..., where D0 = 0; 14,763.00 mg C. Dn+1 = 0.44Dn + 259, n = 0, 1, 2, ..., where D0 = 0; 372.96 mg D. Dn+1 = 0.56Dn + 259, n = 0, 1, 2, ..., where D0 = 259; 663.04 mg
Multiply. Write the result in the form a + bi.(3 + 4i)2
A. 9 - 16i B. 25 + 24i C. 9 + 16i D. -7 + 24i
Provide an appropriate response.Identify the algebraic expression that contains 2 terms.
A. 3(x + 4)
B. 
C. 2x + y - 6
D. 5x - 7