Mis primas son muy altas pero mis primos son _____ altos que ellas. A. mayores B. menores C. mucho D. más
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Suppose you are playing a game with two number cubes. Let A represent rolling 2, 3, or 4, and B represent rolling 1, 5, or 6. The probability of A is 1/2 and the probability of B is 1/2 . a. Simplify( 1/2 A + 1/2 B)^2 b. What is the probability that one number cube shows 2, 3, or 4, and the other shows 1, 5, or 6?
Weegy: I'm not sure what part (a) is about. But if A represents P(event A) and similarly for B, you have (1/2 * 1/2 + 1/2 * 1/2)^2 = (1/4 + 1/4)^2 = (1/2)^2 = 1/4 If that's not what A and B represent, you have, [ more generally, (A/2 + B/2)^2 = A^2/4 + B^2/4 + 2 AB / 4 = A^2 / 4 + B^2 / 4 + AB / 2 For part (b): Roll one of the cubes. The top facing number will be either from {1 5 6} or {2 3 4} - it doesn't matter which. Then you want the other one to have its top face come from the other trio of numbers, so P(success) = 3/6 = 1/2 You could work out the formula with a longer computation: P(156 & 234) + P(234 & 156) = 2 * (1/2 * 1/2) = 2 * 1/4 = 1/2 But that would be extra work. Which I just did anyway! Darn! ] (More)
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Solve the system using elimination. 3x + 3y = –9 3x – 3y = 21 A. (3, –6) B. (–5, 2) C. (3, 3) D. (2, –5)
Weegy: D. (2, –5). The solution for the system of equations 3x + 3y = –9, 3x – 3y = 21 is (2, -5). Source: (More)
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Simplify the expression. Write the answer using scientific notation. 8(8.8 x 1012) A. 70.4 x 1012 B. 70.4 x 1024 C. 70.4 x 1013 D. 1.68 x 1013
Weegy: A. 70.4 x 10^12 is the answer. (More)
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