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Ratling [72]
3 years ago
10

Find the sum precal I really need help I don’t know how to do it

Mathematics
1 answer:
Evgen [1.6K]3 years ago
7 0

Answer:

11

Step-by-step explanation:

Plug in

0 for j to get 1

1 for j to get -2

2 for j to get 4

3 for j to get -8

4 for j to get 16

Then add 1 - 2 + 4 - 8 + 16 = 11

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If its 10/16 what is answer as a decimal
Vedmedyk [2.9K]

Answer:

0.625 is a decimal and 62.5/100 or 62.5% is the percentage for 10/16.

Step-by-step explanation:

Please mark brainliest and have a great day!

3 0
3 years ago
Read 2 more answers
A manufacturer of sprinkler systems designed for fire protection claims that the average activating temperature is at least 135°
nirvana33 [79]

Answer:

z=\frac{133-135}{\frac{3.3}{\sqrt{32}}}=-3.428      

p_v =P(z  

If we compare the p value and the significance level given for example \alpha=0.1 we see that p_v so we can conclude that we reject the null hypothesis, and the true mean is significantly lower than 135 so the claim not makes sense      

Step-by-step explanation:

Data given and notation      

\bar X=133 represent the sample mean

\sigma=3.3 represent the standard deviation for the population      

n=32 sample size      

\mu_o =135 represent the value that we want to test    

\alpha represent the significance level for the hypothesis test.    

z would represent the statistic (variable of interest)      

p_v represent the p value for the test (variable of interest)  

State the null and alternative hypotheses.      

We need to conduct a hypothesis in order to determine if the true mena is at least 135, the system of hypothesis would be:      

Null hypothesis:\mu \geq 135      

Alternative hypothesis:\mu < 135      

We know the population deviation, so for this case is better apply a z test to compare the actual mean to the reference value, and the statistic is given by:      

z=\frac{\bar X-\mu_o}{\frac{\sigma}{\sqrt{n}}} (1)      

z-test: "Is used to compare group means. Is one of the most common tests and is used to determine if the mean is (higher, less or not equal) to an specified value".  

Calculate the statistic      

We can replace in formula (1) the info given like this:      

z=\frac{133-135}{\frac{3.3}{\sqrt{32}}}=-3.428      

Calculate the P-value      

Since is a one-side lower test the p value would be:      

p_v =P(z  

Conclusion      

If we compare the p value and the significance level given for example \alpha=0.1 we see that p_v so we can conclude that we reject the null hypothesis, and the true mean is significantly lower than 135 so the claim not makes sense      

3 0
3 years ago
PLEASE HELPPP!! A box contains only black and white chips There are 8 black chips and 6 white chips How many white chips must be
Law Incorporation [45]
Lets take away 2 white chips...

8 black and 4 white...total of 12 chips
P(black) = 8/12 = 2/3

remove 2 white chips <==
3 0
3 years ago
Solve the inequality 47.75 + x &lt; 50 to determine how much more weight can be added to Li's suitcase without going
ehidna [41]

Answer:

Answer Choice A

Step-by-step explanation:

I took this assignment

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8 0
3 years ago
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Find the missing number ____:7 = 12:21 <br><br><br> A) 3<br><br> B) 14 <br><br> C) 4 <br><br> D) 12
LUCKY_DIMON [66]
I hope this helps and i hope wecan be  great  friends!!!!! and corrrect me if wrong but i think its A!!!!!!!!
   
   
     
    
   
        ~ 12 year old kakashi hatake














6 0
3 years ago
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