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3 years ago

How do I multiply this?

Mathematics

2 answers:

creativ13 [48]3 years ago

7 0

$\boxed{(\sqrt{4t-3})(\sqrt{4t-3})=(\sqrt{4t-3})^2=4t-3}$

Novay_Z [31]3 years ago

3 0

Oh my goodness . . .

What do you get when you multiply a number by itself ?
Do you get the square of the number ?

And what do you get when you square the square root of a number ?
Is it the number inside the square root ?

For just a second, let's take the quantity (4t - 3) and call it ' Q '.
Then the problem is to multiply
√Q times √Q .
Isn't that just ' Q ' ?

And is this enough help ?

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harina [27]

Answer:

Step-by-step explanation:

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3 years ago

It has been observed that electrical connectors manufactured by Jolt Electrical Supply Company last an average of 18.2 months an

Juli2301 [7.4K]

Answer:

340

Step-by-step explanation:

The first step is finding the percentage of those who fail within 19 months.

Problems of normally distributed samples can be 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.

In this problem, we have that:

$\mu = 18.2, \sigma = 1.7$

The proportion is the pvalue of Z when X = 19. So

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$Z = \frac{19 - 18.2}{1.7}$

$Z = 0.47$

$Z = 0.47$ has a pvalue of 0.6808.

Jolt is expected to replace 0.6808 of the connectors sold. Out of 500, that is, on average, 0.6808*500 = 340.

Jolt expects to replace, on average, 340 of the connectors sold.

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3 years ago

Segment AE is a median for Triangle ABC.

Shalnov [3]

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