Factor the trinomial, if possible.x2 + 2xy - 99y2
A. (x - 11y)(x + 9y)
B. (x - 11y)(x + y)
C. (x + 11y)(x - 9y)
D. prime
Answer: C
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The size of two matrices is given. Find the size of the product AB and the product BA, if the products exist.A is 2 × 1, B is 1 × 1.
A. AB is 2 × 1, BA is undefined. B. AB is 1 × 2, BA is 1 × 1. C. AB is undefined, BA is 1 × 2. D. AB is 2 × 2, BA is 1 × 1.
Perform the given operations. Let U = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10} (U represents the universal set).
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B. 
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Match the quadratic function to the correct graph.y = (x + 6)2
A. 
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D. 
Find the indicated probability.The following contingency table shows age at retirement (broken down by career) for a group of retired people.Retirement Age
Suppose one of these people is selected at random from the 61-65 age group. Find the probability that the person selected was an attorney.
A. 0.428 B. 0.109 C. 0.254 D. 0.237