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lozanna [386]
4 years ago
15

If you drive 164 miles in the morning and 219 miles in the afternoon what is the estimate total number of miles drove that day?

Mathematics
2 answers:
aalyn [17]4 years ago
5 0

Answer:

380 exact answer is 383

Step-by-step explanation:

164 rounded to the nearest tens is 160.

219 rounded to the nearest tens is 220.

160+220

=380

Have a nice day!!!!!!!!! :-)

<u>KA</u>

alex41 [277]4 years ago
4 0

Answer:

380

Step-by-step explanation:

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Based on quantitative reasoning, Alden should take the classes from Dr. Baeno in his next semester.

Quantitative Reasoning Behind Choosing Dr. Baeno

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Making Comparison

Now, since we know that,

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The capacity for using knowledge and mathematics to address problems in the real world is known as quantitative reasoning.

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2 years ago
Divide (-3x^2 - 9x) ÷ (x + 3) <br> please explain/show work! &lt;33
Stolb23 [73]

Step-by-step explanation:

<em>( - 3 {x}^{2} - 9x) \div (x + 3)</em>

<em>This </em><em>is </em><em>the</em><em> </em><em>original </em><em>equation</em><em> </em><em>so</em><em> </em><em>you </em><em>will</em><em> </em><em>open</em><em> </em><em>the</em><em> </em><em>brackets</em><em>.</em>

<em>- 3 {x}^{2}  - 9x \div x + 3</em>

<em>The</em><em> </em><em>x</em><em> </em><em>will</em><em> </em><em>cross</em><em> </em><em>the</em><em> </em><em>division </em><em>sign</em><em> </em><em>making</em><em> </em><em>it</em><em> </em><em>times</em><em> </em><em>x</em><em>.</em>

<em>3 {x}^{2}  - 9x \times x = 3</em>

<em>So</em><em> </em><em>you </em><em>will</em><em> </em><em>proceed</em><em> </em><em>to</em><em> </em><em>multiply</em><em> </em><em>the</em><em> </em><em>9</em><em>x</em><em> </em><em>by</em><em> </em><em>x</em><em> </em><em>making </em><em>it</em><em>;</em>

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<em>So</em><em> </em><em>you</em><em> </em><em>will</em><em> </em><em>subtract</em><em> </em><em>9</em><em>x</em><em>²</em><em> </em><em>from</em><em> </em><em>3</em><em>x</em><em>²</em><em> </em><em>which</em><em> </em><em>won't </em><em>be</em><em> </em><em>possible </em><em>so</em><em> </em><em>it </em><em>will</em><em> </em><em>be</em><em> </em><em>negative</em><em>.</em>

<em>- 6 {x}^{2} = 3</em>

<em>Then</em><em> </em><em>you </em><em>will</em><em> </em><em>square</em><em> </em><em>root</em><em> </em><em>both</em><em> </em><em>sides</em><em> </em><em>making</em><em> </em><em>it</em><em>;</em>

<em>- \sqrt{6 {x}^{2} } =  \sqrt{3}</em>

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<em>-6x</em><em>=</em><em>1</em><em>.</em><em>7</em><em>3</em><em>(</em><em>Divide</em><em> </em><em>both</em><em> </em><em>sides</em><em> </em><em>by</em><em> </em><em>-</em><em>6</em><em>)</em>

<em>x</em><em>=</em><em>0</em><em>.</em><em>2</em><em>8</em><em>8</em>

<em>That</em><em>'s</em><em> </em><em>the</em><em> </em><em>final </em><em>answer</em><em>.</em>

8 0
3 years ago
Out of 2,000 random but normally distributed numbers with a mean of 45 and a standard deviation of x, approximately 1,360 number
lina2011 [118]

Answer:

A. 5

Step-by-step explanation:

It says that the sample is normally distributed, which means it follows the bell curve in terms of spreading.  That means that 68% of the numbers are within two standard deviations, centered on the mean, one standard deviation below, one up.

That's confirmed by the fact that 1,360 numbers (exactly 68% of 2,000) are between 40 and 50.  Since the mean is 45, that gives a spread of ± 1 standard deviation for 68% of the numbers.

One standard deviation goes from 40 to 45, another from 45 to 50.

So, the standard deviation of this sample is 5.

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3 years ago
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