On the midterm exam in their anthropology course, Jan’s deviation score was +5, Kim’s was -12, and Leslie’s was 0.
a) of these three, who did the best and who did the worst?
b) the mean for the class was 80. What was the raw score for Jan, Kim, and Leslie?

Me solve this problem, and someone clearly explain to me how to solve it.1.) use the value of the discriminant to determine if the given trinomials has 2 real solutions, 1 real solution, or no real solutions.a.  x2  − 4x  − 7 = 0b. 4r2  + 11r  − 3 = 0c. 3m2  + 7 = 0d.  t2  + 2t  + 1 = 0

What is the range? can’t seem to find it out

Lena reflected this figure across the x-axis. she writes the vertices of the image as a'(−2, 8), b'(−5, 6), c'(−8, 8), d'(−4, 2).