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patriot [66]
3 years ago
15

I need help fast. Number 18 and 19

Mathematics
1 answer:
balu736 [363]3 years ago
3 0

Answer:

18.=400%

Step-by-step explanation:

80/20 we get 4 then we multiple 4 ×100 we get 400 and we check the answer 400% ×20 =80

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A commuter railway has 800 passengers a day and charges each one 2 dollars. ?
Fiesta28 [93]

Answer:

I= -20p^2 + 840p

Step-by-step explanation:

When the ticket price is $2 there are 800 passengers daily, but every $0.1 increase in ticket price the number of passengers will be decreased by 2.  

You can put information into these equations of:

passenger- = (800-2x)

ticket price= p = $2 + 0.1x

Income is calculated by multiplying the number of the passenger with the ticket price. The answer will be expressed in terms of the ticket price, so we need to remove x from the passenger equation.

p= $2 +0.1x

p-$2 = 0.1x

x= 10p- $20

If  p= ticket price, the function for the number of passengers it will be:

passenger = (800-2x)

passenger = 800- 2(10p- $20)

passenger =800- 20p+40

passenger =840- 20p

The function of I will be:

I= passenger x ticket price

I=  840- 20p * p

I= -20p^2 + 840p

4 0
3 years ago
Javier went to the zoo today and saw 161616 monkeys. That is 333 fewer than he saw last Saturday. How many monkeys did Javier se
coldgirl [10]
So the total amount he saw today was 333 less than what he saw last time. Which means last time there was 333 more monkeys

Last sat he saw 161,949 monkeys
4 0
3 years ago
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If the actual distribution of tusk lengths does not match the ones predicted with the H-W equation, it may indicate that natural
Anna [14]

Answer:

See explanation below

Step-by-step explanation:

It depends on what null hypothesis is under consideration.

One of the most common null hypothesis that are subject of study in a given statistical model is <em>the mean</em> predicted by the model.

In this case, the scientist probably observed that the mean of tusk lengths she obtained in a sample did not match the one predicted with the H-W equation.

So, she decided to perform a statistical study by collecting random samples and measuring the tusk lengths to determine a new possible mean and contrast it against the one predicted by the H-W equation.

<em>Let's call M the mean predicted by the H-W equation, and S the mean obtained by the scientist. </em>

If M different of S and the p-value is 0.021, that means that <em>there is at most 2.1% of probability that the difference between M and S could be due to a random sampling error. </em>

It should be kept in mind that the p-value does not represent the probability that the scientist is wrong.

7 0
3 years ago
Can anyone help me with number 3 please
Gnoma [55]
Answer:


I think is (B)
4 0
3 years ago
Kesia is practicing her free throws. She made 5/8 of the shots she took at basketball practice today. use long division to find
katen-ka-za [31]

Answer:

0.625

Step-by-step explanation:

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3 years ago
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