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kap26 [50]
3 years ago
9

Use the discriminant to describe the roots of each equation. Then select the best description.

Mathematics
1 answer:
Marrrta [24]3 years ago
4 0
Let's find the discriminant of <span>x^2+9x+14=0.  Here, a=1, b=9 and c=14.

The discriminant is b^2-4ac.  Substituting the above numeric values,
                                9^2-4(1)(14) = 81-56 = 25

The sqrt of 25 is 5.  Thus, your polynomial has two unequal, real roots.

Off the point example:  If the discriminant were zero, your poly would have two real, equal roots.</span>
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2 years ago
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3 years ago
A segment bisector makes two segments that have equal length?
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3 years ago
Which triangles are similar to triangle ABCABCA, B, C? Choose 1 answer: Choose 1 answer: (Choice A) A DEFDEFD, E, F (Choice B) B
Karolina [17]

Answer:

Triangle ABCABCA, B, C the option C is correct.

Step-by-step explanation:

As in the triangle ABCABCA, B, C

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4 0
3 years ago
What are the chances your flight will leave on time? Below are a histogram and summary statistics for the percentage of flights
Jet001 [13]

Answer:

80.0456<\bar x<81.1210

Step-by-step explanation:

-Given the mean, \bar y=80.5833 and s=2.77369, the confidence interval can be calculated using the formula:

\bar x\pm z\times \frac{\sigma}{\sqrt{n}}

#We substitute our values in the formula to solve for CI:

=\bar x\pm z\times \frac{\sigma}{\sqrt{n}}\\\\=\bar y\pm z_{0.05}\times \frac{s}{\sqrt{72}}\\\\=80.5833\pm 1.645\times \frac{2.77369}{\sqrt{72}}\\\\=80.5833\pm0.5377\\\\=[80.0456,81.1210]

Hence, the confidence interval lies between 80.0456 and 81.1210

4 0
3 years ago
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