Multiply.8(-9)
A. 72
B. -72
C. 1
D. -1
Answer: B
Mathematics
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Find the expected value for the random variable x having this probability function.
A. 6.3 B. 8 C. 6 D. 7.5
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Find the least common multiple of the given polynomials.x2- 4x+ 4, 5x- 10
A. 5(x - 2)(x + 2) B. 5(x + 2)(x + 2) C. 5(x + 2)(x - 2) D. 5(x - 2)(x - 2)
Mathematics
Solve the problem.Sue can sew a precut dress in 3 hours. Helen can sew the same dress in 2 hours. If they work together, how long will it take them to complete sewing that dress? Give your answer rounded to one decimal place, if necessary.
A. 1.8 hr B. 5 hr C. 1.2 hr D. 2.5 hr
Mathematics