1. Let u = <-7, -2>. Find 8u. (2 points) <56, 16>
<-56, 16>
<-56, -16>
<56, -16>

2. Let u = <7, -3>, v = <-9, 5>. Find 4u - 3v. (2 points)
<55, -27>
<1, 3>
<16, 12>
<-8, -6>

3. Let u = <-3, -5>, v = <-3, 1>. Find u + v. (1 point)
<-2, -8>
<-8, -2>
<0, -6>
<-6, -4>

Complete the equation of the live through (-1,6) (7,-2)

One of the complementary angles is 4 degrees mor than the other. find the angles (recall that complementary angles are angles whose sum is 90 degrees.) which of the following can not be used to solve the problem if x represents one of the angles? a. 2x-4=90 b. 2x+4=90 c. x+4=90

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)