3 years ago

What does 4 (2x +5) equal to?!!

Mathematics

1 answer:

____ [38]3 years ago

8 0

8x+20 by multiplying 4 to 2x and 5 :)) hope this help!!!

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Given sin x=0.5 what is cos x

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$sinx=0,5=\frac{1}{2}$

$sin^2x+cos^2x=1$
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The sum of three numbers is 84, the second number is 2 times the 3rd , the first number is 8 more than the 3rd. What are the num

hjlf

Answer:

a = 27

b = 38

c = 19

Step-by-step explanation:

a + b + c = 84

b = 2c

a = 8+c

8+c +2c+c = 84

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3 years ago

The mean value of 500 homes in a county is $225,000 and the standard deviation is $25,000. approximately how many of the homes i

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240 homes in the county are between $175,000 and $225,000.

The image attached is associated with this question and m in it refers to the mean value which is $225000 here and d refers to the standard deviation which is $25000 here.

Now since m= $225000

and $175000= $225000-$50000= $225000-(2* $25000)= m-2d

Thus, as per the image area covered between m and m-2d= $225000

and $175000 is (34%+14%)of 500 homes= 68% of 500= 240 homes, is the answer.

A random variable X is said to follow a normal distribution if its parameters are mean and standard deviation. Every other distribution can be reduced to a normal distribution.

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Elaborate, where’s the picture of the problem?

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