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4 years ago

Which are solutions to the equation below?

Mathematics

2 answers:

pishuonlain [190]4 years ago

5 0

X^2 + 18 = -9x
x^2 +9x +18 = 0
(x+3) (x+6) =0

So x = -3 and x =-6
Answers: E and F

mojhsa [17]4 years ago

3 0

The answers would be E and F -6 and -3

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It has been estimated that a student’s final grade in a course decreases by 5 points for every 2 days absent from class. If a st

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3 years ago

17, 8, 16, 20, 13, 6. Find the mean and median

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Step-by-step explanation:

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3 years ago

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3 years ago

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Lesechka [4]

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3 years ago

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Angle A is circumscribed about circle O what is the length of AB

Nana76 [90]

Answer:

$AB \approx 4.054$

Step-by-step explanation:

The trigonometric equations associated with the figure are, respectively:

$AB = 4\cdot \cos 73^{\circ} + 3\cdot \cos \alpha$

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The components with the unknown angle are cleared and used in the fundamental trigonometric relation:

$3\cdot \cos \alpha = AB - 4\cdot \cos 73^{\circ}$

$3\cdot \sin \alpha = 4\cdot \sin 73^{\circ} - 3$

$9\cdot \cos^{2}\alpha + 9\cdot \sin^{2}\alpha =(AB-4\cdot \cos 73^{\circ})^{2}+(4\cdot \sin 73^{\circ}-3)^{2}$

$9 = AB^{2}-2.339\cdot AB + 1.368 + 0.681$

The following second-order polynomial is presented below:

$AB^{2}-2.339\cdot AB -6.951 = 0$

Roots of the polynomial are described hereafter:

$AB_{1} \approx 4.054$ and $AB_{2} \approx -1.715$

Only the first root is reasonable, as length is a positive variable. The length is $AB \approx 4.054$ .

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3 years ago