Mathematics, 15.01.2020 08:31 robert7248
Riley and erik have earned a total of 135 tokens to buy items in the school store. the ratio of the number of tokens that riley had to the number of tokens that erik has is 8 to 7. how many tokens does riley have?
Answers: 2
Mathematics, 21.06.2019 20:30
What is always true when two whole numbers are subtracted?
Answers: 1
Mathematics, 21.06.2019 22:30
1.based of the diagrams what is the the value of x? 2.how would you verify your answer for x
Answers: 1
Mathematics, 21.06.2019 22:30
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
Mathematics, 22.06.2019 00:30
Anew test for ra is being developed. the test is administered to 750 patients with ra and 750 without ra. for the sake of the question, assume the prevalence of ra in this population is 50%. of the 750 patients with ra, 575 have a positive result. of the 750 patients without ra, 150 have a positive result. what is the positive predictive value of the new test? a575/(575+150) b. 600/(600+ 150) c. 575/(575+125) d. 600/(600+ 125)
Answers: 2
Riley and erik have earned a total of 135 tokens to buy items in the school store. the ratio of the...
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