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Kisachek [45]
3 years ago
9

Find the Square root of √39-2x = 5

Mathematics
1 answer:
4vir4ik [10]3 years ago
5 0
Has to be correct. I did it on paper and checked it. Then I checked it with a calculator

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twice a number minus 4 is less than three times the number. (define a variable, write an inequality, and solve for the problem)
Simora [160]
X will represent unknown
2x-4<3x
treat the < sign as a = sign
2x-4=3x
subtract 2x form both sides
-4=x
put the < sign back
-4<x
-4 is less than than x or
x is greater than -4
4 0
3 years ago
Read 2 more answers
Adam works at a bakery. He uses 1/8 of his flour supply to make bread and 3/4 of his flour supply to make other baked goods. If
kykrilka [37]

Answer: B  

he has 24 in his supply!

Step-by-step explanation:

7 0
3 years ago
A) Find the GCF<br> B) Factor out the GCF<br> C) What are the solutions?
Shalnov [3]

Answer:

A) GCF = b^{2}

B) b^{2}(3b + 10) = 0

C) b = 0, b = -10/3

Step-by-step explanation:

4 0
3 years ago
Uncle percy only has 10% of teashirts he started with if he has 25 now how many did he start with
nataly862011 [7]

Answer:

250

Step-by-step explanation:

Since you are looking for the amount of shirts he had you will need to divide 25 by .10 or just multiply by 10.

6 0
3 years ago
Read 2 more answers
A development economist is studying income growth in a rural area of a developing country. The last census of the population of
kykrilka [37]

Answer:

If we compare the p value and the significance level given \alpha=0.01 we see that p_v>\alpha so we can conclude that we have enough evidence to FAIL reject the null hypothesis, so we can say that the population mean is not singificantly higher than 425.  

Step-by-step explanation:

Data given and notation  

\bar X=433.75 represent the mean height for the sample  

\sigma=\sqrt{2500}=50 represent the population standard deviation for the sample  

n=100 sample size  

\mu_o =425 represent the value that we want to test

\alpha=0.01 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 check if the mean height actually is higher than the mean height for men in 1960, the system of hypothesis would be:  

Null hypothesis:\mu \leq 425  

Alternative hypothesis:\mu > 425  

Since we know the population deviation so 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{433.75-425}{\frac{50}{\sqrt{100}}}=1.75    

P-value

Since is a one right tail test the p value would be:  

p_v =P(z>1.75)=1-P(z  

Conclusion  

If we compare the p value and the significance level given \alpha=0.01 we see that p_v>\alpha so we can conclude that we have enough evidence to FAIL reject the null hypothesis, so we can say that the population mean is not singificantly higher than 425.  

3 0
3 years ago
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