The perimeter of a rectangle is 22. + 50. If the length of the rectangle is 63 + 20 find the width of the rectangle. Hint: Remember, rectangles have 2 lengths and 2 widths. Draw, and label, a picture if it might help you.

In the 30-60-90 triangle below side s has a length of and side r has a length

X2 + y 2 = 36 x + y = 6 solve the system of equations.

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)