Prepare a probability distribution for the experiment. Let x represent the random variable, and let P represent the probability.Three coins are tossed, and the number of tails is noted.
A. 
B. 
C. 
D. 
Answer: B
Mathematics
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Express the number in scientific notation.2500
A. 2.5 × 10-2 B. 2.5 × 10-3 C. 2.5 × 103 D. 2.5 × 102
Mathematics
Translate the phrase to an algebraic expression. Use n for the variable unless otherwise stated.four times the sum of some number and ten
A. 4n - 10 B. 4(n + 10) C. 4(n - 10) D. 4n + 10
Mathematics
Multiply the polynomials.(-4x - 10y)(2x - 2y + 1)
A. -8x2 + 8xy - 4x + 20y2 B. -8x2 - 20xy - 4x + 20y2 - 10y C. -8x2 - 12xy - 4x + 20y2 - 10y D. -8x2 - 12xy - 12y2
Mathematics
Solve the problem.In the following formula, y is the minimum number of hours of studying required to attain a test score of x: 
How many hours of study are needed to score 90?
A. 31.70 hr B. 101.08 hr C. 7.86 hr D. 3.17 hr
Mathematics