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Nikitich [7]
3 years ago
9

Nesecito ayuda con esta operación ( -1/5 +2/5) +4/7

Mathematics
2 answers:
Elina [12.6K]3 years ago
6 0
No se la respuesta lo siento
jasenka [17]3 years ago
3 0

Answer:

27 /35

Step-by-step explanation:

Para sumar fracciones, busque el LCD y luego combinar.

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Dolores spent $ 13.00 of the $20.00 in her wallet. Which decimal represents the fraction of the $20.00 Dolores spent?
Veronika [31]

Answer:

In order to find the fraction of the 20 dollars that has been spent, we have to divide the amount spent by the total amount. So 0.65 is the fraction of 20 that is spent.

Step-by-step explanation:

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2 years ago
What is 25% of 75? <br><br> Answer now! High value question on the market!<br><br> [ Really! ]
coldgirl [10]

Step-by-step explanation:

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6 0
3 years ago
Read 2 more answers
An engineer commutes daily from her suburban home to her midtown office. The average time for a one-way trip is 36 minutes, with
Ivanshal [37]

Answer:

57.93% probability that a trip will take at least 35 minutes.

Step-by-step explanation:

Problems of normally distributed samples are solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the zscore of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this problem, we have that:

\mu = 36, \sigma = 4.9

What is the probability that a trip will take at least 35 minutes

This probability is 1 subtracted by the pvalue of Z when X = 35. So

Z = \frac{X - \mu}{\sigma}

Z = \frac{35 - 36}{4.9}

Z = -0.2

Z = -0.2 has a pvalue of 0.4207

1 - 0.4207 = 0.5793

57.93% probability that a trip will take at least 35 minutes.

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3 years ago
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Please read the attached file

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What is a radius? Is it the point in the middle?How do you calculate the circumference using 3.14 pi?
Elina [12.6K]
Half of the distance from one side, through the middle, to the other side. 
circumference: 3.14*radius*2
7 0
3 years ago
Read 2 more answers
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