Can someone help me With this is geometry and I need to get it right

Which is f(5) for the function –2x2 + 2x - 3?

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)

Check all that apply. f is a function. f is a one-to-one function. c is a function. c is a one-to-one function.