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21.07.2019 •
Mathematics
What are the roots of x in -10x^2+12x-9=0
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Ответ:
Option B.
Step-by-step explanation:
We have the following polynomial: -10x^2+12x-9=0
Multiplying by -1:
10x^2-12x+9=0
Using the quadratic formula, we find that the roots are:
0.6 ± 3√(6)/10i
Therefore, the correct answer is B.
Ответ:
7.) 4
8.)
Step-by-step explanation:
7.) When two lines are parallel, their slopes will be the same.
The given equation is written in slope-intercept form,
, where m is the slope. Therefore, a parallel line will have a slope of 4.
8.) When two lines are perpendicular, their slopes are opposite reciprocals. This basically means that the slope is flipped over and given the opposite value. Take the slope:
Flip it:
Give it the opposite value. Since it is positive, it will be negative:
Therefore, a perpendicular line will have a slope of
:Done