Work out the difference in minutes between 1 hour 25 minutes and 1 1/4 hours step by step please :)

Mathematics

1 answer:

Maru [420]3 years ago

3 0

$\huge\boxed{\boxed{\bold{10\ \bftext{minutes}}}}$

$\hrulefill$

First, let's change both of these times into just minutes. (We know that one hour is sixty minutes.)

$\text{First time: } 1*60+25=60+25=85$

$\text{Second time: } 1*60+\frac{1}{4}*60=60+15=75$

Now, just subtract:

$85-75=\large\boxed{10}$

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Find the inverse of the function. f(x) = 7x + 8

lana66690 [7]

Answer:

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Step-by-step explanation:

A way to find the inverse function is to swap the x and y (f(x)) in the equation.

$y = 7x + 8\\x = 7y + 8\\x-8 = 7y\\y = \frac{x-8}{7}$

We can check that it is an inverse function by using a property of inverse functions:

$f(g(x)) = x$

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Assume that adults have IQ scores that are normally distributed with a mean of 96 and a standard deviation of 15.7. Find the pro

astraxan [27]

Answer:

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Step-by-step explanation:

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

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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.

In this question, we have that:

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