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lys-0071 [83]
3 years ago
13

What’s a larger number is two less than four times a smaller. if the sum of the number is 18

Mathematics
1 answer:
s344n2d4d5 [400]3 years ago
6 0
Let x be the larger number and y be the smaller number.
Using the given info, we get
x = 4y - 2
We also know that 
x + y = 18
Substitute x = 4y -2 into x + y = 18
(4y -2) +y = 18
5y - 2 = 18
5y = 20
y = 4
Enter this value into x = 4y - 2
x = 4(4) - 2
x = 14
The larger number is 14 and the smaller one is 4.
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Complete Question

The complete question is shown on the first uploaded image

Answer:

The score of the student is  x = 779.42

Step-by-step explanation:

Generally we can mathematically represent the z-score as

         z =  \frac{x - Mean}{ stDev}

Here x is the score of the student

substituting 1045.7 for the Mean, 221.9 for the stDev and -1.2 for z we have  

          -1.2 =  \frac{x - 1045.7 }{ 221.9}

=>       -266.28 =  x -1045.7

=>     x  =  -266.28 + 1045.7

=>     x = 779.42

7 0
4 years ago
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Answer:

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Step-by-step explanation:

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4 0
4 years ago
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Answer:

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Step-by-step explanation:

3 0
3 years ago
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Use the FOIL method.

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