4 years ago

Mulitply (2-2)(3x+4) using distributive property

Mathematics

1 answer:

Sati [7]4 years ago

3 0

8x.......................

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The heights of the trees in a forest are normally distributed, with a mean of 25 meters and a standard deviation of 6 meters. Wh

Alla [95]

Answer:

2.3%

Step-by-step explanation:

The formula to convert x into z distribution is

$z=\frac{x-\mu}{\sigma}$

Where z is the test statistic

x is what we are looking for (in this case 37)

$\mu$ is the mean (in this case, it is 25)

$\sigma$ is the standard deviation (we have 6)

<em>Plugging these into the formula, we get:</em>

$z=\frac{x-\mu}{\sigma}\\z=\frac{37-25}{6}\\z=2$

Thus we can say we want $P(z\geq 2)$

<u>Note: </u> $P(z\geq a)=1-P(z\leq a)$

The table given is for any z where $P(z\leq a)$

Thus, now we have:

$P(z\geq 2)\\=1-P(z\leq 2)\\=1-0.9772\\=0.0228\\$

0.0228 into percentage is 0.0228 * 100 = 2.28%

Rounded, we get 2.3%

Third answer choice is right.

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4 years ago

Write as a mixed fraction: 22 / 3

lakkis [162]

7 1/3

I think this is it, i would like for u to get a second opinion.

4 0

4 years ago

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Solve -3x^2-4x-4=0. Use the quadratic formula.

zepelin [54]

Let's solve your equation step-by-step.
−3x2−4x−4=0
Step 1: Use quadratic formula with a=-3, b=-4, c=-4.
x=
−b±√b2−4ac
2a
x=
−(−4)±√(−4)2−4(−3)(−4)
2(−3)
x=
4±√−32
−6

Answer:
No real solutions.

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3 years ago

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I need help with 89 divided by 6 in remainder

mars1129 [50]

18.433333333, please mark brainlest! :)

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Help with this please

Paha777 [63]

I think it is B
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3 years ago