Let f(x, y) = x2 - xy + y2 + 2y - 4. The point 
is a
A. absolute maximum
B. not a relative extreme point
C. relative minimum
D. relative maximum
Answer: C
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Write a system of three inequalities that describe the constraints in the problem.Mrs. White wants to crochet beach hats and baby afghans for a church fund-raising bazaar. She needs 5 hours to make a hat and 2 hours to make an afghan and she has 31 hours available. She wants to make no more than 11 items and no more than 9 afghans. The bazaar will sell the hats for $11 each and the afghans for $5 each. Let x equal the number of hats made and y equal the number of afghans made.
A. 2x + 5y ? 31, x + y ? 11, y ? 9 B. 5x + 2y ? 31, x + y ? 11, y ? 9 C. 11y + 5x ? 31, x + y ? 11, y ? 9 D. 11x + 5y ? 31, x + y ? 11, y ? 9
Perform the operations indicated. Write your answer in simplest form.-13.1 - (-12.8)
A. 25.9 B. -25.9 C. 0.3 D. -0.3
Write an equivalent expression without negative exponents.
A. 
B. - 
C. - 
D. 
Determine the coefficient and degree of each term, then find the degree of the polynomial.x10y - 9x6y4 + 6x5y2
A. 
; Degree of polynomial: 10
B. 
; Degree of polynomial: 7
C. 
; Degree of polynomial: 28
D. 
; Degree of polynomial: 11