Which shows the correct substitution of the values a, b, and c from the equation -2 = -x + x2 - 4 into the quadratic formula?
Quadratic formula: x =
-b I/62-400
20
O x=-(-1)V(- 1)2 - 4(1)(-4)
2(1)
Ox=
- 11/12 - 4(- 1)(-4)
2(-1)
O x=-117(1)2-4(-117-2)
2(-1)
-(-1):«(- 1)2 - 4(1)(-2)
x =
2(1)

the answer is su.k.my? ? co.kc

answer: c.  

step-by-step explanation:

mixtures containing substances that get attracted to magnet can be separated using a magnet. we can separate iron from a mixture of sand and iron, as only iron attracts to the magnet.

7 is the median   7.875 is the mean

step-by-step explanation:

3,4,5,6,8,11,13,13