If you would like to find the equation, you can do this using the following steps:
D = b^2 - 4 * a * c
D = 12
0 = -x^2 + 8x + 2
D = 8^2 - 4 * (-1) * 2 = 64 + 8 = 72
0 = 2x^2 + 6x + 3
D = 6^2 - 4 * 2 * 3 = 36 - 24 = 12
0 = -x^2 + 4x + 1
D = 4^2 - 4 * (-1) * 1 = 16 + 4 = 20
0 = 4x^2 + 2x + 1
D = 2^2 - 4 * 4 * 1 = 4 - 16 = - 12
The correct result would be <span>0 = 2x^2 + 6x + 3.</span>
Answer:
Step-by-step explanation:
Use the formula to find the z-score, then go to the table that will give you the probability that the value is less than this z-score.
![z=\frac{53-50}{3}=1](https://tex.z-dn.net/?f=z%3D%5Cfrac%7B53-50%7D%7B3%7D%3D1)
The probability that the value lies to the left of 1 on a standard bell curve is 84.1345%, or 84%, the third choice down.
Answer D. It is the closets answer to my calculations so im sorry if im wrong
(-3s +2t)(4s -t) = -12s^2 +3st +8st -2t^2 = -12s^2 +11st -2t^2 so the last one choice is right sure