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siniylev [52]
3 years ago
7

Question in screen shot

Mathematics
1 answer:
DedPeter [7]3 years ago
7 0

Answer:

Step-by-step explanation:

1/y = (x-1)/4

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What is the perimeter of a square with 4 inch sides
notsponge [240]

Answer:

16 units

Step-by-step explanation:

We know a square is 4 sides, and perimeter is the sum of all sides.

4 + 4 + 4 + 4 = 16 units

we can do this in a more efficient way with:

4 x 4 =16 units

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If x=y and y=2 then 3x=
meriva
I believe that the answer is 6. Feel free to check yourself but i think its 6
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Professor Jennings claims that only 35% of the students at Flora College work while attending school. Dean Renata thinks that th
lisov135 [29]

Answer:

z=\frac{0.462 -0.35}{\sqrt{\frac{0.35(1-0.35)}{78}}}=2.074  

Now we can calculate the p value with this probability:

p_v =P(z>2.074)=0.019  

If we use a significance level os 0.05 we see that the p value is lower than the significance level so then we can conclude that the true proportion of students with jobs is higher than 0.35 for this case. If we decrease the significance level to 1% the result changes otherwise not.

Step-by-step explanation:

Information given

n=78 represent the random sample taken

X=36 represent the students with jobs

\hat p=\frac{36}{78}=0.462 estimated proportion of students with jobs

p_o=0.35 is the value that we want to test

z would represent the statistic

p_v represent the p value

Hypothesis to test

We want to test if the proportion of students with jobs is higher than 0.35, the system of hypothesis are:  

Null hypothesis:p \leq 0.35  

Alternative hypothesis:p > 0.35  

The statistic is given by:

z=\frac{\hat p -p_o}{\sqrt{\frac{p_o (1-p_o)}{n}}} (1)  

Replacing the info we got:

z=\frac{0.462 -0.35}{\sqrt{\frac{0.35(1-0.35)}{78}}}=2.074  

Now we can calculate the p value with this probability:

p_v =P(z>2.074)=0.019  

If we use a significance level os 0.05 we see that the p value is lower than the significance level so then we can conclude that the true proportion of students with jobs is higher than 0.35 for this case. If we decrease the significance level to 1% the result changes otherwise not.

5 0
4 years ago
An airline finds that if it prices a cross-country ticket at $200, it will sell 300 tickets per day. It estimates that each $20
olya-2409 [2.1K]

We can write that as a function:

f(n)=(200 -20n) * (300 + 50n)\\f(n)=60000+10000n-6000n-1000n^2\\f(n)=-1000n^2+4000n+60000\\

where n is the number of price reductions. We can see that it is a quadratic function which has the biggest value at P = (p, q). It means that p is the number of reductions which results in the biggest profit.

p=\frac{-b}{2a}=\frac{-4000}{-2000}=2

It means that it's the best to make 2 price reductions for the company. The tickets should be sold for $200 - 2 * $20 = $160. It results in 2 * 50 more tickets sold which is 300 + 100 = 400.

Answer:

Ticket price: $160

Number of tickets: 400

6 0
3 years ago
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