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zavuch27 [327]
3 years ago
9

2.(3x²-5)-5=9 Ayuda/help

Mathematics
1 answer:
Viefleur [7K]3 years ago
3 0

Answer:

2

Step-by-step explanation:

2(3x²-5)-5=9

6x²-10-5=9

6x²-15=9

6x²=9+15

6x²=24

x²=24/6

x²=4

x=2

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If a binomial x-a is a factor of a polynomial p(x), then p(a)=0.

x+2 is a factor of p(x)=x³-6x²+kx+10, so p(-2)=0.

p(-2)=0 \\
(-2)^3 - 6 \times (-2)^2 + k \times (-2) + 10=0 \\
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3 years ago
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Which statements are always true regarding the diagram? Select three options. m∠5 + m∠3 = m∠4 m∠3 + m∠4 + m∠5 = 180° m∠5 + m∠6 =
DanielleElmas [232]

Based on the triangle sum theorem, exterior angle theorem, the true statements are:

m∠5 + m∠6 = 180°

m∠2 + m∠3 = m∠6

m∠2 + m∠3 + m∠5 = 180°

<h3>What is the Triangle Sum Theorem and the Exterior Angle Theorem?</h3>

According to the triangle sum theorem, m∠2 + m∠3 + m∠5 = 180°.

Also, based on the exterior angle theorem, m∠2 + m∠3 = m∠6.

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In summary, the true statements about the diagram given are:

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  • m∠2 + m∠3 + m∠5 = 180°

Learn more about the triangle sum theorem on:

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8 0
1 year ago
3x^2 + 2x-4 = 0 help
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Step-by-step explanation:

how to answer that

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Suppose a 2011 Gallup poll revealed that 76% of Americans believe that high achieving students should be recruited to become tea
k0ka [10]

Answer:

95% Confidence interval:  (0.73,0.79)

Step-by-step explanation:

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Sample size, n = 1021

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95% Confidence interval:

\hat{p}\pm z_{stat}\sqrt{\dfrac{\hat{p}(1-\hat{p})}{n}}

z_{critical}\text{ at}~\alpha_{0.05} = \pm 1.96

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Based only on the information given in the diagram, it is guaranteed that JKL ~ WXY.
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<u>In the triangle WXY</u>

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The measurements of the angles of triangle WXY are 27\°-90\°-63\°

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