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nadya68 [22]
4 years ago
5

Jay can paint a car in six hours. mike can paint the same car in three hours. if they work together, how long will it take them

to paint the car?
Mathematics
1 answer:
pentagon [3]4 years ago
7 0
Let x be number of hours taken working together, then:-

1/6 + 1/3  = 1 / x

* thru by the LCD 6x:-

x + 2x = 6
3x = 6
x = 2

Answer:-   they will take 2 hours.
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A construction firm bids on two different contracts. Let E1 be the event that the bid on the first contract is successful, and d
marissa [1.9K]

Calculate the probability that both bids are successful

Answer:

The probability that both contracs are successful is 0.21

Step-by-step explanation:

Given

E1 = the event that the bid on the first contract is successful

E2 = the event that the bid on the second contract is successful

P(E1) = 0.3

P(E2) = 0.7

Let P(A) represent the event that both contracts are successful

P(A) = P(E1 and E2)

Since both events are independent. P(A) becomes

P(A) = = P(E1 * P(E2)

By substituton

P(A) = 0.3 * 0.7

P(A) = 0.21

Hence the probability that both contracs are successful is 0.21

7 0
3 years ago
The 2016 Minneapolis Resident Survey was a questionnaire that the City of Minneapolis issued to its randomly chosen residents. I
sukhopar [10]

Answer: I and III

Step-by-step explanation:

We observe in the case provided that the researcher, who has no interest in the population to intervene, is going to carry out surveys to assess whether the neighborhood is a good place to live, obtaining the following conclusions:

i. The Minneapolis Resident Survey was an observational study.

ii. The Minneapolis Resident Survey was an experiment.

iii. The figure 50.1% is a descriptive statistic for the sample.

iv. The figure 50.1% is a statistical inference for the population.:By estimating the sample, obtained by a lower percentage of the total of the respondents, it is known that with a 95% confidence interval that the rating obtained from the respondents considering that the neighborhood is a good place to live was found between 0.44 and 0.50, taking this interval as a statistical inference for the population.

The correct answer is I and III, since in this study no interventions were made to the population and only one observation of a characteristic of the neighborhood was made and in III we know that the descriptive statistic only describes data and summarizes it, which is a of the ways to display the data from the descriptive survey.

3 0
3 years ago
3 men painting a house take 7's
iVinArrow [24]

Answer:

21 days

Step-by-step explanation:

7 0
3 years ago
I'LL GIVE BRAINLIEST TO WHOEVER ANSWERS THE QUESTION CORRECTLY!!!!
RUDIKE [14]

Answer:

looks like D...............

6 0
2 years ago
What are the coordinates of the vertex of the parabola described by the equation below?
yanalaym [24]
Quick answer is (3,5)
8 0
3 years ago
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