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DerKrebs [107]
1 year ago
10

The set of negative numbers are closed under division true or false if false explain

Mathematics
1 answer:
Delvig [45]1 year ago
8 0

Answer:

false

Step-by-step explanation:

A negative number divided by a negative number results in a positive number.

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if it cost $75,000 to put on an event and total revenue is $135,000, how much profit did the concert bring in ?
ludmilkaskok [199]

$60,000

135,000-75,000= 60,000

just take the cost away from the revenue

4 0
3 years ago
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Plz help me this is mathswatch by the way
ArbitrLikvidat [17]

Answer:

111g

Step-by-step explanation:

185 divided by 5 is 37

The reason you divide by 5 is because that is the total of the numbers of the ratio.

37 x 3 is 111

I multiply by 3 because it is the value of the yogurt according to the ratio

Please mark brainliest

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3 years ago
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6. Mrs. Sam buys pencils for $15 per one hundred packs.
Alexxx [7]

Answer:

a.) her loss is 5 dollars

b.) her profit is 10 dollars

c.) she should sell them for $0.15

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3 years ago
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sertanlavr [38]

Answer:

The first answer, 3 times the square root of x squared is correct.

8 0
3 years ago
A survey of 865 voters in one state reveals that 408 favor approval of an issue before the legislature. Construct the 95% confid
katrin [286]

Answer:

The 95% confidence interval for the true proportion of all voters in the state who favor approval is (0.4384, 0.5050).

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of \pi, and a confidence level of 1-\alpha, we have the following confidence interval of proportions.

\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}

In which

z is the zscore that has a pvalue of 1 - \frac{\alpha}{2}.

For this problem, we have that:

n = 865, \pi = \frac{408}{865} = 0.4717

95% confidence level

So \alpha = 0.05, z is the value of Z that has a pvalue of 1 - \frac{0.05}{2} = 0.975, so Z = 1.96.

The lower limit of this interval is:

\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.4717 - 1.96\sqrt{\frac{0.4717*0.5283}{865}} = 0.4384

The upper limit of this interval is:

\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.4717 + 1.96\sqrt{\frac{0.4717*0.5283}{865}} = 0.5050

The 95% confidence interval for the true proportion of all voters in the state who favor approval is (0.4384, 0.5050).

6 0
3 years ago
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