Which of these answer choices describe expressions? Select all that apply. 8 is four less than twice n

Twice the value of n

Half the sum of 5 and 3

2\ \frac{1}{4}2
4
1
​

less than n

1/2 of 28 is 14

Look at the hyperbola graphed below. the hyperbola gets very close to the red lines on the graph, but it never touches them. which term describes each of the red lines? o o o o a. asymptote b. directrix c. focus d. axis

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)

In his stamp album ,jamal has 48 new stamps and 72 used stamps. which ratio can be represented by 3/5