Select the correct answer. If A = [5 -8 3 0] -and B = [2 -9 1 0] , which matrix is the result of 2A - 38? A [4 11 3 0] B. (4 38 9 0] C. [4 11 9 0] D. [1 -18 1 0]

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)

Given the equation negative 4 square root x minus 3 equals 12

Skie rented a boat for $16.50 per hour. her total rental fee was $49.50. for how many hours did skie rent the boat