Mathematics, 19.08.2019 02:30 kelly3215
Ametal worker has several 1-kilogram bars of a metal alloy that contains 23%copper and several 1-kilogram bars that contain 79% cooper. how many bars of each type of alloy should be melted and combined to create 48 kilograms of a 44% copper alloy?
Answers: 1
Mathematics, 21.06.2019 18:00
Jack has a piece of red ribbon that is two times as long as his piece of blue ribbon. he says that he can use two different equation to find out how long his piece of red ribbon is compared to his piece of blue ribbon is. is he correct? explain his reasoning
Answers: 1
Mathematics, 21.06.2019 21:30
In a test for esp (extrasensory perception), a subject is told that cards only the experimenter can see contain either a star, a circle, a wave, or a square. as the experimenter looks at each of 20 cards in turn, the subject names the shape on the card. a subject who is just guessing has probability 0.25 of guessing correctly on each card. a. the count of correct guesses in 20 cards has a binomial distribution. what are n and p? b. what is the mean number of correct guesses in 20 cards for subjects who are just guessing? c. what is the probability of exactly 5 correct guesses in 20 cards if a subject is just guessing?
Answers: 1
Mathematics, 22.06.2019 00:00
The construction of copying qpr is started below. the next step is to set the width of the compass to the length of ab. how does this step ensure that a new angle will be congruent to the original angle? by using compass take the measures of angle and draw the same arc according to it.
Answers: 1
Ametal worker has several 1-kilogram bars of a metal alloy that contains 23%copper and several 1-kil...
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