A zookeeper is monitoring the supply of grain and hay that she has to feed the animals for the week. She currently has eight pounds of hay. One pound of hay feeds the animals for three days. The grain that she has to feed the animals is shown in the graph below. Given the rate at which the zookeeper is giving the animals hay and grain, on which day will she have the same amount of grain and hay remaining?

Which expression gives the exact value of x?

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)

K-7/4=11 explanation: k-7 is the numerator and 4 is the denominator then right by it it just says = 11 ( i wish i knew how to do this but ummm i cant sis)