Write the equation of the line perpendicular to the given line y - 2 = 1/4 (x+2)

Which coefficient matrix represents a system of linear equations that has a unique solution ? options in photo*

The points (1, 7) and (0, 2) fall on a particular line. what is its equation in slope-intercept form?

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)