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3 years ago

7

Do the ratios 3 8 and 4 7 form a proportion?

1 answer:

wlad13 [49]3 years ago

4 0

The ratios 3:8 and 4:7 are not proportion. You can tell this easily by how in the second ratio, the first number is one larger, but the second number is 1 lower. If this was proportional, then both numbers would go either up or down depending on the circumstance.

May I have brainliest pleasER? :)

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sladkih [1.3K]

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4 years ago

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3 years ago

In order to determine whether or not there is a significant difference between the mean hourly wages paid by two companies (of t

dybincka [34]

Test statistic = (mean 1 - mean 2) / sqrt( dev1/n1 + dev2/n2)

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8 0

3 years ago

Let u = <-9, 4>, v = <8, -5>. Find u - v. <br> URGENT

Pie

To subtract vectors, you simply have to subtract correspondent coordinates.

So, if you have

$u = \langle u_1,\ u_2,\ldots u_n\rangle ,\quad v = \langle v_1,\ v_2,\ldots v_n\rangle$

the subtraction is simply

$u-v = \langle u_1-v_1,\ u_2-v_2,\ldots u_n-v_n\rangle$

So, in your case, we have

$\langle-9,4\rangle-\langle 8,-5\rangle=\langle -9-8, 4+5\rangle=\langle -17,9\rangle$

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3 years ago