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borishaifa [10]
3 years ago
8

What is the answer ?

Mathematics
2 answers:
Sedbober [7]3 years ago
5 0

Answer:

D. Stephen

Hope This Helps!     Have A Nice Day!!

Tamiku [17]3 years ago
3 0

Answer:

D. Stephen that's what I got

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An item is regularly priced at $25. It is on sale for 80% off the regular price. What is the sale price?
Natasha2012 [34]
The answer is $5.

One way:
80% of 25 is 25*0.80=20
So, 80% off means $20 off.
If you take $20 off from $25, the price is $5.

Another way:
If you take 80% off, the remaining is 20%.
20% of 25 is 25*.2=5.
4 0
3 years ago
Read 2 more answers
Members of a soccer team suspect the coin used for the coin toss at the beginning of their games is unfair. They believe it turn
Vilka [71]

Answer:

The p-value is 0.0013. He should reject the null in favor of the alternative.

Step-by-step explanation:

We are given that Members of a soccer team suspect the coin used for the coin toss at the beginning of their games is unfair. They believe it turns up tails less often than it should if it were fair.

The coach of the team decides to flip the coin 100 times and count the number of tails. His trial results in 35 tails.

Let p = <u><em>proportion of occurrence of tail.</em></u>

SO, Null Hypothesis, H_0 : p = 0.50     {means that it turns up tails equal to that it should if it were fair}

Alternate Hypothesis, H_A : p < 0.50      {means that it turns up tails less often than it should if it were fair}

The test statistics that would be used here <u>One-sample z-test for proportions;</u>

                            T.S. =  \frac{\hat p-p}{\sqrt{\frac{ p(1-p)}{n} } }  ~ N(0,1)

where, \hat p = sample proportion of tails occurrence = \frac{35}{100} = 0.35

            n = sample of trails = 100

So, <u><em>the test statistics</em></u>  =  \frac{0.35-0.50}{\sqrt{\frac{0.50(1-0.50)}{100} } }    

                                     =  -3

The value of z test statistics is -3.

Also, P-value of the test statistics is given by;

                P-value = P(Z < -3) = 1 - P(Z \leq 3)

                              = 1 - 0.9987 = <u>0.0013</u>

Since, the P-value of test statistic is less than the level of significance as 0.0013 < 0.01, so we have sufficient evidence to reject our null hypothesis as it will fall in the rejection region due to which <em><u>we reject our null hypothesis</u></em>.

Therefore, we conclude that it turns up tails less often than it should if it were fair.

4 0
3 years ago
How do you tell if its one solution
lisov135 [29]

Answer:

when x equals one number, if it was no solution then x=y

Step-by-step explanation:

6 0
2 years ago
(6-5) × (4-2) + 12/4 = 5
ehidna [41]

\\ \sf\longmapsto (6-5)\times (4-2)+\dfrac{12}{4}=5

\\ \sf\longmapsto 1(2)+\dfrac{12}{4}=5

\\ \sf\longmapsto 2+\dfrac{12}{4}=5

\\ \sf\longmapsto \dfrac{8+12}{4}=5

\\ \sf\longmapsto \dfrac{20}{4}=5

\\ \sf\longmapsto 5=5

4 0
3 years ago
Read 2 more answers
Can you explain these words Rate, Per, Divide, Unit and the connections you see between them. Thank you very kind!!!
mestny [16]

Answer:

A rate is a little bit different than the ratio, it is a special ratio. It is a comparison of measurements that have different units, like cents and grams. A unit rate is a rate with a denominator of 1.

Per is defined as to, for, by or according to. An example of per used as a preposition is in the phrase, "as per standards," which means by the standards

Division is splitting into equal parts or groups. It is the result of "fair sharing

5 0
3 years ago
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