Using point-slope form, write the equation of the line that passes through the point

What is the best way to answer questions with a x expression in the question. for example 3x + 10x=?

What is the value of p in the equation y^ = -4x?

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)