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4 years ago

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Mathematics

1 answer:

PtichkaEL [24]4 years ago

4 0

Answer:

question wrong

Step-by-step explanation:

2 same angles

$\frac{13+5}{z} = \frac{z}{5} \\\\z^{2} = 5 * 18\\z^{2} = 90\\z = \sqrt{90} = 9,4$

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In 2016, the mean score on the AP Art History exam was 3.8, with a standard deviation of 1.2. The mean score on the AP English e

Ulleksa [173]

Answer:

$X+Y \sim N(\mu_X +\mu_Y , \sqrt{\sigma^2_X +\sigma^2_Y})$

The mean is given by:

$\mu = 3.8+2.9= 6.7$

And the standard deviation would be:

$\sigma =\sqrt{1.2^2 + 1.7^2} = 2.08$

And the distribution for X+Y would be:

$X+Y \sim N(6.7 , 2.08)$

And the best answer would be:

D.) Mean, 6.7; standard deviation, 2.08

Step-by-step explanation:

Let X the random variable who represent the AP Art History exam we know that the distribution for X is given by:

$X \sim N(3.8, 1.2)$

Let Y the random variable who represent the AP English exam we know that the distribution for X is given by:

$X \sim N(2.9, 1.7)$

We want to find the distribution for X+Y. Assuming independence between the two distributions we have:

$X+Y \sim N(\mu_X +\mu_Y , \sqrt{\sigma^2_X +\sigma^2_Y})$

The mean is given by:

$\mu = 3.8+2.9= 6.7$

And the standard deviation would be:

$\sigma =\sqrt{1.2^2 + 1.7^2} = 2.08$

And the distribution for X+Y would be:

$X+Y \sim N(6.7 , 2.08)$

And the best answer would be:

D.) Mean, 6.7; standard deviation, 2.08

8 0

3 years ago

Read 2 more answers

HELP PLS all the info you need is in the picture need to solve for x

Andrews [41]

Answer:

x=8

Step-by-step explanation:

x^2 - 48 = 2x

x^2 - 2x - 48=0

(x+6)(x-8)=0

x+6=0 x-8=0

x= - 6 x=8

can not be negative so the answer is x=8

8 0

3 years ago

Help pls and fast 21x+1+26=28

Naya [18.7K]

X=1/21 that the answer

8 0

4 years ago

Read 2 more answers

I need to know the answer

sergiy2304 [10]

14.1 is the correct answer i just calculated it and then subtracted

8 0

3 years ago

2. If p(x) = 7x-9 and g(x) = x2 +8, what is r(x) = (p * 2)(x)?

Naddika [18.5K]

Answer:

r(x) = 14x - 18

Step-by-step explanation:

(p×2)(x) = 2×p(x) = 2×(7x - 9) = 14x - 18

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3 years ago