The axis of symmetry for the function f(x) = –2x2 + 4x + 1 is the line x = 1. Where is the vertex of the function located? (0, 1)
(1, 3)
(1, 7)
(2, 1)

Lisa has three classes that each last 50 minutes. what is the total number of minutes of the three classes

Compare the cost of the bike trips from the two companies shown.for both the cost in a linear function of the number of days which statements is true

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)