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Valentin [98]
3 years ago
12

Simplify : -26b^2 + (-27b^2)

Mathematics
2 answers:
____ [38]3 years ago
5 0

<u><em>-53b² is the correct answer.</em></u><em>  </em>First you had to remove parenthesis first, and it gave us, -26b^2-27b^2. And then add similar elements, and it gave us the answer is -26b^2-27b^2=-53b^2, or -53b² is the right answer. Hope this helps! And thank you for posting your question at here on brainly, and have a great day. -Charlie

IgorLugansk [536]3 years ago
3 0
Step by step solution :

Step 1 :

Equation at the end of step 1 :

(0 - (26 • (b2))) + (0 - 33b2)
Step 2 :

Equation at the end of step 2 :

(0 - (2•13b2)) + -33b2
Step 3 :

Final result :

-53b2
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Suppose the heights of 18-year-old men are approximately normally distributed, with mean 71 inches and standard deviation 4 inches.

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(b) If a random sample of thirteen 18-year-old men is selected, what is the probability that the mean height x is between 70 and 72 inches? (Round your answer to four decimal places.)

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Answer: 0.6326

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