Natalie and ashley are selling fruit for a school fundraiser. customers can buy small boxes of grapefruit and large boxes of grapefruit. natalie sold 14 small boxes of grapefruit and 8 large boxes of grapefruit for a total of $156. ashley sold 7 small boxes of grapefruit and 10 large boxes of grapefruit for a total of $132. what is the cost of one small box of grapefruit and one large box of grapefruit?

Write the point-slope form of the line passing through (2, -12) and parallel to y=3x.

In triangle △abc, ∠abc=90°, bh is an altitude. find the missing lengths. ah=4 and hc=1, find bh.

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)