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3 years ago

For non-zero denominators, simplify:

"TexFormula1" title="\frac{3a^3-75a}{a(a+5)(a+5)}" alt="\frac{3a^3-75a}{a(a+5)(a+5)}" align="absmiddle" class="latex-formula">

Mathematics

1 answer:

Debora [2.8K]3 years ago

8 0

$\frac{3a^3-75a}{a(a+5)(a+5)}=\frac{3a(a^2-25) }{a(a+5)(a+5)}=\frac{3a(a - 5)(a+5) }{a(a+5)(a+5)} =\frac{3 (a - 5) }{ (a+5) }$

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Answer: he hiked 5.6 miles up the canyon.

Step-by-step explanation:

Let x represent his speed hiking uphill.

His speed running downhill was 2.8 mph greater than his speed hiking uphill. This means that his speed running downhill would be x + 2.8

Distance = speed × time

Kevin hiked up Lamb’s Canyon in 2 hours. This means that the distance covered by hiking uphill is 2 × x = 2x

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Since the distance uphill is the same as the distance downhill, then

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3 years ago

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3 years ago

Read 2 more answers

**view image**

vladimir1956 [14]

The chart has been completed in the picture attached.

Step-by-step explanation:

Step 1:

It is given that the number of bacteria doubles every 6 hours.

So if there are 1 million now, in 6 hours there would be double that i.e. 2 million and it will go on.

Step 2:

As the first column says the number of 6-hour periods, the second column is the actual number of hours.

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