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3 years ago

Correct answers only please! If you don't know the answer, then please don't guess or say what you think it is.

Mathematics

2 answers:

Ipatiy [6.2K]3 years ago

8 0

M. Dbhd dhs here 54.2

miss Akunina [59]3 years ago

4 0

Answer:

B. 63.8 mph

Step-by-step explanation:

IN order to solve this problem we just have to keep in mind that the miles per hour is calulcated by the number of revolutions that the tire is doing multiplied by the circumference of the tire, so the circumference of the tire is given by the first set of number in the tire the first one would be:

$first:\frac{215}{60} \\Second: \frac{235}{70}$

So we just have to multiply it by the first one and then divide it by the second:

$\frac{215}{60}*60=215\\215*\frac{235}{70}=63.8$

SO when the speedometer is on 60 mph, he will actually be going at 63.8 mph.

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bixtya [17]

Answer:

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Step-by-step explanation:

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3 years ago

Read 2 more answers

Please can someone help me please

Tomtit [17]

You can use variables to solve this problem. Lets say that m is men, w is women, and c is children. m+w+c=266
four times as many men as children in ‘math words’ would be 4c=m
twice as many women as children would be 2c=w
what we can do now is plug those in to make everything easier with one variable
4c+2c+c=266
7c=266
c=38 now we have how many children, and we need to plug it back into what we have for women and men.
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152 men, 76 women, and 38 children

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3 years ago

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ICE Princess25 [194]

Answer:

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Step-by-step explanation:

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3 years ago

If the y-coordinate of an ordered pair is zero and the x-coordinate of the same ordered pair is negative, the point is on the ax

loris [4]

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3 years ago

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vesna_86 [32]

Answer:

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Step-by-step explanation:

We need to understand the normal probability distribution and the central limit theorem to solve this question.

Normal probability distribution

Problems of normally distributed samples are solved using the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma$ , the zscore 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 pvalue, we get the probability that the value of the measure is greater than X.

Central Limit Theorem

The Central Limit Theorem estabilishes that, for a normally distributed random variable X, with mean $\mu$ and standard deviation $\sigma$ , the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean $\mu$ and standard deviation $s = \frac{\sigma}{\sqrt{n}}$ .