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3 years ago

Which is the best estimate of the sum of 356 and 71, IF each number is rounded to the nearest ten?

Mathematics

2 answers:

xxMikexx [17]3 years ago

8 0

/ 357 + 71= 427 you’ve got to add it to get the sum of the numbers together

lyudmila [28]3 years ago

7 0

Hey there!

So 356 + 71 = 427

and if you round it to the nearest tenth then you're rounding the 27 up.

This means that your answer will be 430.

Here's a chart to help remind you which numbers to round! :-)

Hope this helps!

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Step-by-step explanation:

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devlian [24]

Answer: 4xy+6x+2x^2

Step-by-step explanation:

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3 years ago

Please help logarithms!

nlexa [21]

Given:

$\log_34\approx 1.262$

$\log_37\approx 1.771$

To find:

The value of $\log_3\left(\dfrac{4}{49}\right)$ .

Solution:

We have,

$\log_34\approx 1.262$

$\log_37\approx 1.771$

Using properties of log, we get

$\log_3\left(\dfrac{4}{49}\right)=\log_34-\log_349$ $\left[\because \log_a\dfrac{m}{n}=\log_am-\log_an\right]$

$\log_3\left(\dfrac{4}{49}\right)=\log_34-\log_37^2$

$\log_3\left(\dfrac{4}{49}\right)=\log_34-2\log_37$ $[\log x^n=n\log x]$

Substitute $\log_34\approx 1.262$ and $\log_37\approx 1.771$ .

$\log_3\left(\dfrac{4}{49}\right)=1.262-2(1.771)$

$\log_3\left(\dfrac{4}{49}\right)=1.262-3.542$

$\log_3\left(\dfrac{4}{49}\right)=-2.28$

Therefore, the value of $\log_3\left(\dfrac{4}{49}\right)$ is $-2.28$ .

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weeeeeb [17]

Working attached below:

Hope this helps! Any questions let me know :)

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