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777dan777 [17]
2 years ago
7

How to do this problem??

Mathematics
1 answer:
ahrayia [7]2 years ago
7 0

The answer would be 16 3/4 divided by 3 7/8

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-3x+9y=-54 what is the y intercepts
3241004551 [841]
One way to find the y int is to sub in 0 for x and solve for y

-3x + 9y = -54
-3(0) + 9y = -54
9y = -54
y = -54/9
y = -6....so ur y int is -6 or (0,-6)
5 0
3 years ago
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One number is 77 more than another. the difference between their squares is 203203. what are the numbers?
galben [10]
Idk never herd of that
8 0
2 years ago
What is 3a^9r^-3/-4a-2
Lana71 [14]

Answer:

_   <u>3a^8-8r^3</u>

       4r^3    

Step-by-step explanation:

5 0
3 years ago
The manufacturer of an airport baggage scanning machine claims it can handle an average of530 bags per hour.(a-1) At α = .05 in
-Dominant- [34]

Answer:

b. H0: μ < 530. Reject H0 if tcalc > -1.753

Step-by-step explanation:

1) Data given and notation  

\bar X=507 represent the sample mean

s=47 represent the sample standard deviation  

n=16 sample size  

\mu_o =530 represent the value that we want to test  

\alpha represent the significance level for the hypothesis test.  

t 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 check if the mean is less than 530 (left tailed tes), the system of hypothesis would be:  

Null hypothesis:\mu \geq 530  

Alternative hypothesis:\mu < 530  

If we analyze the size for the sample is < 30 and we don't know the population deviation so is better apply a t test to compare the actual mean to the reference value, and the statistic is given by:  

t=\frac{\bar X-\mu_o}{\frac{s}{\sqrt{n}}} (1)  

t-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:  

t=\frac{507-530}{\frac{47}{\sqrt{16}}}=-1.957

Critical value

Since we are conducting a left tailed test we need to first find the degrees of freedom for the statistic given by:

df=n-1=16-1=15

Now we need to look on the t distribution with 15 degrees of freedom that accumulates 0.05 of the area on the left area. And on this case the critical value would be t_{\alpha}=-1/753.

And we can use the following excel code to find it: "=T.INV(0.05,15)"  

So then the correct rejection zone for H0 would be: Reject H0 if t_{calc}

P-value  

Since is a one side left tailed test the p value would be:  

p_v =P(t_{(15)}  

Conclusion  

If we compare the p value and the significance level for example \alpha=0.05 we see that p_v so we can conclude that we have enough evidence to fail reject the null hypothesis, so we can conclude that the mean is significantly lower than 530 at 5% of significance.  

6 0
2 years ago
Which is the most accurate way to estimate 50% of 41?
sasho [114]

Answer:

The easiest way is to round down to 40 and take 50% of that, which is 20. The actual answer is 20.5.

Step-by-step explanation:

5 0
2 years ago
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