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maw [93]
2 years ago
9

3. 18 is 40% of what number?​

Mathematics
2 answers:
Mariulka [41]2 years ago
8 0

#Lets just write x as the nunber you asked

x × 40/100 = 18

x = 18 : 40/100

x = 18 × 100/40

y = 1800/40

y = 45

<h3>Answer : 45</h3>
DIA [1.3K]2 years ago
8 0

Answer:

45

Step-by-step explanation:

take the unknown number as z

40%=40/100

40/100×z=18

2/5×z=18. (40/100=2/5)

z=18/2×5

z=45

Hope you've understood

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In 1979 the Wincom river was 33 feet below the bridge. Because of silt build-up in the river bottom, the
MAVERICK [17]

Answer: d = 40 - 5/2t; 1995

Hope it helps :)

7 0
1 year ago
A person purchased a slot machine and tested it by playing it 1,137 times. There are 10 different categories of outcomes, includ
ivann1987 [24]

Answer:

p_v= P(\chi^2_{9}>11.517)=0.2419

And on this case if we see the significance level given \alpha=0.1 we see that p_v>alpha so we fail to reject the null hypothesis that the observed outcomes agree with the expected frequencies at 10% of significance.

Step-by-step explanation:

A chi-square goodness of fit test determines if a sample data obtained fit to a specified population.

p_v represent the p value for the test

O= obserbed values

E= expected values

The system of hypothesis for this case are:

Null hypothesis: O_i = E_i[/tex[Alternative hypothesis: [tex]O_i \neq E_i

The statistic to check the hypothesis is given by:

\chi^2 =\sum_{i=1}^n \frac{(O_i -E_i)^2}{E_i}

On this case after calculate the statistic they got: \chi^2 = 11.517

And in order to calculate the p value we need to find first the degrees of freedom given by:

df=n-1=10-1=9, where k represent the number of levels (on this cas we have 10 categories)

And in order to calculate the p value we need to calculate the following probability:

p_v= P(\chi^2_{9}>11.517)=0.2419

And on this case if we see the significance level given \alpha=0.1 we see that p_v>alpha so we fail to reject the null hypothesis that the observed outcomes agree with the expected frequencies at 10% of significance.

6 0
3 years ago
PLEASE HELP :)
Gnom [1K]

Answer:

Math can help us do many things that are important in our everyday lives. ... As a parent, you could talk to your teen about how you use math in your daily life. You ... Share with your child the examples of everyday math applications, which are listed ... Your teen will learn skills in algebra class that will help them with money.

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
-3(p-7) &gt; 21 solve for p​
Goryan [66]

Answer:

p < 0

Step-by-step explanation:

Given

- 3(p - 7) > 21

Divide both sides by - 3, reversing the symbol as a result of dividing by a negative quantity.

p - 7 < - 7 ( add 7 to both sides )

p < 0

5 0
3 years ago
Someone plz help me :(
Ostrovityanka [42]

Answer:

i can JUST GET ON YOUR CROME BOOK

Step-by-step explanation:

3 0
2 years ago
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