Factor.x2 - 18xy + 81y2
A. (x - 9y)(x + 9y)
B. x2 - 18xy + 81y2
C. (x + 9y)2
D. (x - 9y)2
Answer: D
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Write a formula for the nth term of the indicated sequence. Write out the first five terms of the sequence.geometric: a = 4, r = 5
A. an = 4 ? 5n-1; 4, 20, 100, 500, 2500 B. an = 4 ? 5n+1; 20, 100, 500, 2500, 12,500 C. an = 4 ? 5n; 20, 100, 500, 2500, 12,500 D. an = 4 ? 5n; 4, 20, 100, 500, 2500
Solve the problem.39% of a store's computers come from factory A and the remainder come from factory B. 2% of computers from factory A are defective while 3% of computers from factory B are defective. If one of the store's computers is selected at random, what is the probability that it is defective and from factory B?
A. 0.64 B. 0.03 C. 0.018 D. 0.012
Divide. Write the answer in lowest terms and as a whole or mixed number where possible.
÷ 2
A. 3
B. 
C. 
D. 
Solve the equation in the interval [0, 2?). tan x cos x - cos x = 0
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