PH scale measures how much acidic or basic a substance is. Normal drinking water needs to have a pH of less than 8.5 and greater than 6.5. Model the normal range of pH values of water, using a compound inequality. (9th algebra 1)

What are the equivalent ratios for 24/2= /3= /5.5=108/ = /15

Choose the equation that represents the graph below: (1 point) graph of a line passing through points negative 3 comma 0 and 0 comma 3 y = x − 3 y = −x + 3 y = −x − 3 y = x + 3 will award !

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)