Use a sum or difference formula to find the exact value of the following. Sin 6 Pi/5 Cos 13 Pi/15 - Cos 6 Pi/5 Sin 13 Pi/15

Simplify -4z+2y-y+-18z a.-22z+y b.-14z+2 c.3y+22z d. y +14z

Fill in the table with whole numbers to make 430 in five different ways

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)