Help please !! Given sin theta= 2/5
and 0°

Twice the sum of a number and 4 is equal to three times the difference of the number and 7. find the number.

Tatiana reads 40 pages of her book every night for x number of nights. write an expression that shows the number of pages she has read

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)