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MrRa [10]
3 years ago
7

I need help with a math equation, it’s due by 3:00.

Mathematics
1 answer:
Vilka [71]3 years ago
4 0

Answer:

         2x        -7

2x      4x²      -14x

-1       -2x        +7

Step-by-step explanation:

4x²-16x+7 factors as

(2x-7)(2x-1)

So the grid would be:

         2x        -7

2x      4x²      -14x

-1       -2x        +7

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Answer:

x=9

Step-by-step explanation:

2x+12=5x-15

3x=27

x=9

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3 years ago
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A survey showed that 40% of students would select the Ferris Wheel as their favorite ride in the amusement park. How many studen
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2000

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Yesterday, I ran 5 miles. Today I ran 8 miles. What happened to the percent?​
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A data set is normally distributed with a mean of 115 and a standard deviation of 23. What is the probability that a value in th
Alecsey [184]

Answer:

The probability that a value in the data set is greater than or equal to 162

P(X≥162) = 0.0207

<u>Step-by-step explanation:</u>

<u>Step(i)</u>:-

Given mean of the Population = 115

Given standard deviation of the Population = 23

Let 'x' be the random variable of normal distribution

Let x = 162

Z = \frac{x-mean}{S.D} = \frac{162-115}{23}

z = 2.043

<u><em>Step(ii)</em></u>:-

<em>The probability that a value in the data set is greater than or equal to 162</em>

<em>P(X>x) = P(Z>z) = P(Z> 2.043)</em>

P(X≥162) = P(Z≥2.043) = 1-P(Z≤ 2.043)

                                      =  1- ( 0.5 +A(2.043)

                                      =   1-0.5 -A(2.043)

                                      =    0.5 - 0.4793

                                      =  0.0207

<u><em>Final answer</em></u>:-

<em>The probability that a value in the data set is greater than or equal to 162</em>

<em>P(X≥162) = 0.0207</em>

<em></em>

8 0
4 years ago
Is 3 out of four bigger or is 3 out of seven bigger
Alekssandra [29.7K]
3/4 is bigger.

hope this helps you
5 0
3 years ago
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