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
Answer: B
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A. 
3 = 
2
B. x2 + y2 = 
2
C. 
2 = 
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Use the formula for the general term (the nth term) of an arithmetic sequence to find the indicated term of the sequence with the given first term, a1, and common difference, d.Find a19 when a1 = -4, d = - 
.
A. - 34
B. 
C. 26
D. - 
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x2 + 11xy + 12y2 + 4
y + 23 = 0
A. x = 
(2x' + y') and y = 
(x' - 2y')
B. x = 
(x' + 2y') and y = 
(2x' - y')
C. x = 
(2x' - y') and y = 
(x' + 2y')
D. x = 
(x' - 2y') and y = 
(2x' + y')