Answer:
Step-by-step explanation:
A 2nd order polynomial such as this one will have 2 roots; a 3rd order polynomial 3 roots, and so on.
The quadratic formula is one of the faster ways (in this situation, at least) in which to find the roots. From 2x^2 + 4x + 7 we get a = 2, b = 4 and c = 7.
Then the discriminant is b^2 - 4ac, or, here, 4^2 - 4(2)(7), or -40. Because the discriminant is negative, we know that the roots will be complex and unequal.
Using the quadratic formula:
-4 ±√[-40] -4 ± 2i√10
x = ------------------ = ------------------
4 4
-2 ± i√10
Thus, the roots are x = ------------------
2
Answer:
67
Step-by-step explanation:
DM=JM-JD=84-17=67
A.
For Deshaun: $75 - $10x
For Ann: $90 - $15x
B.
$75 - $10x = $90 - $15x
<em>I believe this is right, check over to make sure. I may be wrong, and sorry if I am.</em>
X amount over 41.67 is 60/100
x = 60
---- ------
41.67 100
100x = 2500.20
------ --------
100 100
x=25
plug in to check
25/41.67 = 60/100
0.6 = 0.6
