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xxMikexx [17]
3 years ago
15

How many solutions does this linear system have? Y=2x-5 -8-4y=-20

Mathematics
2 answers:
nataly862011 [7]3 years ago
8 0
The answer is 3.Good luck
Kobotan [32]3 years ago
6 0

Answer:

Infinite number of solutions.

Step-by-step explanation:

/ Solve equation [1] for the variable  y  

 [1]    y = 2x - 5

// Plug this in for variable  y  in equation [2]

  [2]    -4•(2x-5) + 8x = 20

  [2]    0 = 0 =>  Infinitely many solutions

Infinitely many solutions

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Question
balandron [24]

Answer:

The approximate percentage of SAT scores that are less than 865 is 16%.

Step-by-step explanation:

The Empirical Rule states that, for a normally distributed random variable:

Approximately 68% of the measures are within 1 standard deviation of the mean.

Approximately 95% of the measures are within 2 standard deviations of the mean.

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In this problem, we have that:

Mean of 1060, standard deviation of 195.

Empirical Rule to estimate the approximate percentage of SAT scores that are less than 865.

865 = 1060 - 195

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The approximate percentage of SAT scores that are less than 865 is 16%.

8 0
3 years ago
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