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3 years ago

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Tickets to a concert cost $15 online and $25 at the door. One hundred more people bought their tickets at the door than online.

If ticket sales totaled $20.500. how many people bought their concert tickets online?

1 answer:

Arte-miy333 [17]3 years ago

6 0

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Which is a true statement about conjunctions?

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180+8x=160+6x help me find x

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Answer:

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Step-by-step explanation:

Step 1: Write equation

180 + 8x = 160 + 6x

Step 2: Solve for <em>x</em>

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3 years ago

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tresset_1 [31]

Answer:

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b) $P(X$

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Step-by-step explanation:

For this case we have a random variable with the following parameters:

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From the empirical rule we know that within one deviation from the mean we have 68% of the values, within two deviations we have 95% and within 3 deviations we have 99.7% of the data.

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$z= \frac{X -\mu}{\sigma}$

And replacing we got

$z= \frac{34-34}{2.5}= 0$

$z= \frac{39-34}{2.5}= 2$

And we want the probability from 0 to two deviations above the mean and we got 95/2 = 47.5 %

For the second case:

$P(X$

$z= \frac{31.5-34}{2.5}= -1$

So one deviation below the mean we have: (100-68)/2 = 16%

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