Mathematics: Acar travels 2 5/8 miles in 3 and 1/2 minutes at a constant speed what equation can represent to the distance d that the car travels in m minutes

For this case we have the following expression:We rationalize the second term multiplying by:So, we have:6...

Acar travels 2 5/8 miles in 3 and 1/2 minutes at

Ответ:

kadinmorgan

15.03.2022

Mathematics

Given that Distance = 2 5/8 miles = 21/8 miles

Time = 3 and 1/2 minutes = 7/2 minutes

Then speed of the car is given by formula : $Speed=\frac{Distance}{time}=\frac{\frac{21}{8}}{\frac{7}{2}}=\frac{21}{8}*\frac{2}{7}=\frac{42}{56}=\frac{3}{4}$

miles per minute

Hence distance travelled in M minutes will be given by equation

$D=\frac{3}{4}M$

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Ответ:

kayal1076

12.05.2022

Mathematics

For this case we have the following expression:

$3 + 2 \sqrt {2} + \frac {1} {3 + 2 \sqrt {2}} =$

We rationalize the second term multiplying by:

$\frac {3-2 \sqrt {2}} {3-2 \sqrt {2}}:$ $\frac {1} {3 + 2 \sqrt {2}} * \frac {3-2 \sqrt {2}} {3-2 \sqrt {2}} = \frac {3-2 \sqrt {2} } {9-6 \sqrt {2} +6 \sqrt {2} -4 (\sqrt {2}) ^ 2} = \frac {3-2 \sqrt {2}} {9-4 * 2} = \frac {3-2 \sqrt {2}} {1} = 3-2 \sqrt {2}$

So, we have:

$3 + 2 \sqrt {2} + 3-2 \sqrt {2} = 3 + 3 = 6$

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Acar travels 2 5/8 miles in 3 and 1/2 minutes at a constant speed what equation can represent to the distance d that the car travels in m minutes

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