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RUDIKE [14]
3 years ago
6

Need help will mark Brainliest

Mathematics
2 answers:
Kisachek [45]3 years ago
6 0
I believe it is x=55. I could be wrong lol
Soloha48 [4]3 years ago
3 0

Assuming the triangle adds up to 180°, x = 55 because 55 + 5 = 60. 60 x 3 = 180

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6. Which of the following will NOT produce more
ziro4ka [17]

Answer:

i think its obtuse scalene ??

Step-by-step explanation:

i might not be right but im pretty sure

7 0
3 years ago
A rectangular region is removed from another rectangular region to create the shaded region shown below. Find the area of the sh
Mila [183]

Answer:

52

Step-by-step explanation:

Area of bigger rectangle (A1)= 9×11=99

Area of smaller rectangle(A2)=8×6=48

Area of shaded region(A)=99-48=52

6 0
3 years ago
In an examination of purchasing patterns of shoppers, a sample of 16 shoppers revealed that they spent, on average, $54 per hour
Lesechka [4]

Answer:

54-1.64\frac{21}{\sqrt{16}}=45.39    

54 +1.64\frac{21}{\sqrt{16}}=62.61    

So on this case the 90% confidence interval would be given by (45.39;62.61)    

Step-by-step explanation:

Previous concepts

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".

The margin of error is the range of values below and above the sample statistic in a confidence interval.

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

\bar X=54 represent the sample mean  

\mu population mean (variable of interest)

\sigma=21 represent the sample standard deviation

n=16 represent the sample size  

Solution to the problem

The confidence interval for the mean is given by the following formula:

\bar X \pm z_{\alpha/2}\frac{\sigma}{\sqrt{n}}   (1)

Since the Confidence is 0.90 or 90%, the value of \alpha=1-0.9=0.1 and \alpha/2 =0.05, and we can use excel, a calculator or a table to find the critical value. The excel command would be: "=-NORM.INV(0.05,0,1)".And we see that z_{\alpha/2}=1.64

Now we have everything in order to replace into formula (1):

54-1.64\frac{21}{\sqrt{16}}=45.39    

54 +1.64\frac{21}{\sqrt{16}}=62.61    

So on this case the 90% confidence interval would be given by (45.39;62.61)    

4 0
3 years ago
Help !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
statuscvo [17]
Hello!!!

the answer here is the 3rd one!

hope this helps!
5 0
3 years ago
Read 2 more answers
Retro Rides is a club for owners of vintage cars and motorcycles. Every year the club gets together for a ride. This year, 53 ve
kari74 [83]
21 cars, 32 motorcycles.
create a system of equations using x for cars and y for motorcycles.
\left \{ {{x+y=53} \atop {4x+2y=148}} \right.
multiply the top equation by 2 to prepare for elimination method
\left \{ {{2x+2y=106} \atop {4x+2y=148}} \right.
subtract terms
\left \{ {{2x+2y=106} \atop {-4x-2y=-148}} \right.  = (-2x = -42)
divide both sides by negative 2 to solve for x
x =21
plug in x  into original equation to solve for y.
21 + y = 53
subtract both sides by 21
y=32



8 0
3 years ago
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