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3 years ago

Riley has 15 tickets for rides at the

Mathematics

2 answers:

postnew [5]3 years ago

7 0

Answer:

105 tickets more

Step-by-step explanation:

10x3=30

30x4=120

120-15=105

AfilCa [17]3 years ago

3 0

Answer:

105

Step-by-step explanation:

Basically she wants to ride each of the 10 ride 3 times

So she will ride 30 times

Each ride = 4 tickets

So 30 rides = 120 tickets

She already has 15 tickets, so to find the amount of tickets Riley needs, we need to do 120-15, which is 105

Hope this helps your brother :)

Have a great day!

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3 years ago

If (x)=x/2-2 and g(x)=2x2+x-3, find (f+g)(x)

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The combined age of three relatives is 120 years. James is three times the age of Dan, and Paul is two times the sum of James an

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Step-by-step explanation:

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4 years ago

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WINSTONCH [101]

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3 years ago

A set of data items is normally distributed with a mean of 400 and a standard deviation of 60. Find the data item in this distri

Softa [21]

Answer:

The data item is $X = 580$

Step-by-step explanation:

Normal Probability Distribution:

Problems of normal distributions can be solved using the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma$ , the z-score of a measure X is given by:

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

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the p-value, we get the probability that the value of the measure is greater than X.

Mean of 400 and a standard deviation of 60.

This means that $\mu = 400, \sigma = 60$

z=3

We have to find X when Z = 3. So

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

$3 = \frac{X - 400}{60}$

$X - 400 = 3*60$

$X = 580$

The data item is $X = 580$

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3 years ago