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Rama09 [41]
3 years ago
6

Solve each equation by using the square roots property round to the nearest hundredth if necessary

Mathematics
1 answer:
ZanzabumX [31]3 years ago
7 0
X = -2(5 + (sqrt34)) OR 2((sqrt34) - 5)
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Find the area of the composite figure below.
TiliK225 [7]

Answer:

A  =  139.25

Step-by-step explanation:

3 0
2 years ago
Jamie is training for a race and is running laps around a field. If the distance around the field is 350 yards, how many complet
Feliz [49]
First convert 6 miles to yards. That would be 10,560 next divde it by 350 to get 30.1786 but you have to round it to the next lap. Therfore, youll have to run a total of 31 laps around the field.
6 0
3 years ago
The Rocky Mountain district sales manager of Rath Publishing Inc., a college textbook publishing company, claims that the sales
andrezito [222]

Answer:

t=\frac{44-42}{\frac{1.9}{\sqrt{40}}}=6.657    

p_v =P(t_{(39)}>6.657)=3.17x10^{-8}  

If we compare the p value and the significance level given \alpha=0.01 we see that p_v so we can conclude that we have enough evidence to reject the null hypothesis, so we can conclude that the true mean is higher than 42 at 1% of signficance.  

Step-by-step explanation:

Data given and notation  

\bar X=44 represent the sample mean

s=1.9 represent the sample standard deviation

n=40 sample size  

\mu_o =42 represent the value that we want to test

\alpha=0.01 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 higher than 42, the system of hypothesis would be:  

Null hypothesis:\mu \leq 42  

Alternative hypothesis:\mu > 42  

If we analyze the size for the sample is > 30 but 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{44-42}{\frac{1.9}{\sqrt{40}}}=6.657    

P-value

The first step is calculate the degrees of freedom, on this case:  

df=n-1=40-1=39  

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

p_v =P(t_{(39)}>6.657)=3.17x10^{-8}  

Conclusion  

If we compare the p value and the significance level given \alpha=0.01 we see that p_v so we can conclude that we have enough evidence to reject the null hypothesis, so we can conclude that the true mean is higher than 42 at 1% of signficance.  

3 0
3 years ago
100 pts Sam purchased a new car for $17,930. The value of the car depreciated by 19% per year. When he trades the car in after x
erik [133]

Answer: 2500

Step-by-step explanation:

I don’t know if it’s right

4 0
2 years ago
You need to solve for X
sladkih [1.3K]
These are similar triangles so proportions hold. the short side to the bottom side proportion must be the same in both triangles. to solve it

25/30 = 35/x. (25+10=35 is the side of the bigger triangle

cross multiply and solve for x
25x=1050
x=1050/25=42
7 0
3 years ago
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