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prohojiy [21]
3 years ago
12

Bárbara corre con rapidez constante de 5 km/h a lo largo de 500 m que separan el colegio de su casa. Demora 3 minutos en recoger

la tarea que se le había quedado dentro del colegio y se devuelve un poco más lento, a 1 m/s. ¿cuánto tiempo transcurre desde que sale del colegio hasta que vuelve a su casa?
Mathematics
1 answer:
sergiy2304 [10]3 years ago
6 0

Answer:

try socratic it should help

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Applying Inverse Properties In Exercise,apply the inverse properties of logarithmic and exponential functions to simplify the ex
alex41 [277]

Answer:

2x - 1

Step-by-step explanation:

Since logarithm has the following property:

If f(x)=b^x and g(x)=\log_bx,

Then fog=b^{\log_bx}=x and gof=\log_bbx=x

Therefore,

- 1 + \ln e^{2x} = - 1 + \log_e e^{2x} = 2x-1

6 0
3 years ago
Simplify the expression \[\frac{6}{\sqrt{36} + \sqrt{27}} + \frac{6}{\sqrt{27} + \sqrt{18}} + \frac{6}{\sqrt{18} + \sqrt{9}}.\]
Viktor [21]

Answer:

= 18 ( 3 + 2(\sqrt{3}  + \sqrt{2} ))

Step-by-step explanation:

6(\sqrt{36} +\sqrt{27}) + 6(\sqrt{27} +\sqrt{18}) + 6(\sqrt{18} + \sqrt{9} )\\= 6( {6} +\sqrt{9*3}) + 6( \sqrt{9*3}  +\sqrt{9*2}) + 6(\sqrt{9*2} + 3 )\\= 6( {6} +3\sqrt{3}) + 6(3\sqrt{3} +3\sqrt{2}) + 6(3\sqrt{2} + 3 )\\=36 + 18\sqrt{3} + 18\sqrt{3} + 18\sqrt{2}+ 18\sqrt{2} + 18\\= 36+18  +18( \sqrt{3}+ \sqrt{3} +\sqrt{2} + \sqrt{2})\\= 54 + 18 (2\sqrt{3} +2\sqrt{2})\\=54 + 36\sqrt{3}  + 36\sqrt{2}\\= 18 ( 3 + 2(\sqrt{3}  + \sqrt{2} ))

7 0
3 years ago
50-10x=20 what is the value of x in this problem
Andrew [12]
So what I did was I wrote down the problem 50 - 10x = 20.

The first step I did was take 50 and subtract it from both sides: 50 - 10x = 20
                                                                                                   -50            -50
After that i cross out the so 50's and take 20 and subtract it to 50 which gave me -30. So when you write this down you rewrite it as: -10x = -30

Last step: take the -10 and divide it by both sides the cross out the two -10's cause it's going to be written as -30/-10 which would give you x = 3. So there is your answer, hope this helps. :)

~Shadow


7 0
3 years ago
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KATRIN_1 [288]
I believe the answer is "C"
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3 years ago
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Answer:

54

Step-by-step explanation:

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3 years ago
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