Mathematics, 28.03.2020 05:13 rebecabosca
Wolfrich lived in Portugal and Brazil for a total of 14 months in order to learn Portuguese.
He learned an average of 130 new words per month when he lived in Portugal and an average of 150 new words per month when he lived in Brazil. In total, he learned 1920 new words.
How long did Wolfrich live in Portugal, and how long did he live in Brazil
Answers: 2
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Rockwell hardness of pins of a certain type is known to have a mean value of 50 and a standard deviation of 1.1. (round your answers to four decimal places.) (a) if the distribution is normal, what is the probability that the sample mean hardness for a random sample of 8 pins is at least 51?
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You earn a 12% commission for every car you sell. how much is your commission if you sell a $23,000 car?
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Given the system of equations presented here: 2x + 4y = 14 4x + y = 20 which of the following actions creates an equivalent system such that, when combined with the other equation, one of the variables is eliminated? multiply the second equation by â’4 to get â’16x â’ 4y = â’80 multiply the second equation by â’1 to get â’4x â’ y = â’20 multiply the first equation by 2 to get 4x + 8y = 28 multiply the first equation by â’1 to get â’2x â’ 4y = â’14
Answers: 1
Wolfrich lived in Portugal and Brazil for a total of 14 months in order to learn Portuguese.
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