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-Dominant- [34]
3 years ago
10

Someone please help me asap

Mathematics
1 answer:
IrinaK [193]3 years ago
7 0
Angle NLM is 78 degrees

A way to do this is to find the arc measure of NM and then divide it by 2 to find the angle of NLM

So first subtract

360-110=250

To find the remaining amount of the arc measures. Which is 250 degrees

Next set arc measures NM and ML together to 250 to find what x equals.

14x+16+9x+4=250

Combine like terms

23x+20=250

Subtract 20 from both sides

23x=230

Divide 23 from both sides

x=10.

Then substitute 10 for the equation representing the arc measure of NM.

14(10)+16

140+16

156

The arc measure of NM is 156 degrees


The angle NLM is an inscribed angle. Meaning that it is half of the arc that intersects.

156/2

78

Angle NLM is 78 degrees
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You make a salary of $400 a month plus a 10% commission. If your total sales were $2000, how much money in total would you make
kykrilka [37]

Given:

Salary = $400 a month

Rate of commission = 10%

Total sales = $2000

To find:

The total money you will make this month.

Solution:

We have,

Rate of commission = 10%

Total sales = $2000

Commission = 2000\times \dfrac{10}{100}

                    = 200

We know that,

Total money = Salary + Commission

                     = \$400+\$200

                     = \$600

Therefore, the total money you will make this month is $600.

3 0
3 years ago
There is triangle ABC triangle XYZ is similar to ABC scale factor 1/4
Agata [3.3K]

Answer:

The side that is labeled as 7 is 28 the side that is labeled as 5 shoud be 20 the side that is labeled as 4 should be 16

Step-by-step explanation:

Sorry I cant take a screen shot with my computer but here is the explanation it says that the scale factor is 1/4 so I just did 1/4  ÷  7,5,and 4

6 0
3 years ago
Annie invests $400 in a bank that offers 5.5% simple annual interest after 6 years her investment will increase by blank dollars
Zinaida [17]

Answer:

Her investment will increase by <u>551.54</u> dollars

Step-by-step explanation:

So we know that the exponential function formula is f(x)=a(1+r)^x

So knowing that we can input values

So now we have f(x)=400(1+0.055)^6

Since it is annual we will only have the interest yearly so that changes are equation to look like this f(x)=400(1+0.055/1)^6

So next we have to add 1 and 0.055 which is 1.055

So we input that into the equation so now we have f(x)=400(1.055/1)^6

Now we have to do (1.055/1) to the power of six, so we get 1.37884280676

Now we have to 1.37884280676 times 400,  which would be 551.537122705.

Assuming they want to the nearest 100th it would be 551.54

So the answer is <u>551.54 dollars</u>

Hopefully, that helped. If I made any mistake or I am incorrect feel free to correct me. :)

5 0
3 years ago
Families USA, a monthly magazine that discusses issues related to health and health costs, survey 19 of its subscribers. It foun
s344n2d4d5 [400]

Answer:

a

   $10,151   <  \mu  $11448.12

b

  n =  158

Step-by-step explanation:

From the question we are told that

    The  sample size is  n  =  19

    The  sample mean is  \= x  =$10,800

     The  standard deviation is  \sigma  =$1095  

    The  population mean is  \mu  =$225

     

Given that the confidence level is 99%  the level of significance is mathematically represented as

       \alpha  =  100 -99

      \alpha  = 1%

=>    \alpha =  0.01

Now the critical values of \alpha  = Z_{\frac{\alpha }{2} } is obtained from the normal distribution table as

        Z_{\frac{0.01}{2} } =  2.58

The reason we are obtaining values for \frac{\alpha }{2} is because \alpha is the area under the normal distribution curve for both the left and right tail where the 99% interval did not cover while \frac{\alpha }{2}  is the area under the normal distribution curve for just one tail and we need the  value for one tail in order to calculate the confidence interval

Now the margin of error is obtained as

     MOE  =  Z_{\frac{\alpha }{2} } *  \frac{\sigma }{\sqrt{n} }

substituting values

    MOE  =  2.58*  \frac{1095 }{\sqrt{19} }

     MOE  =  648.12

The  99% confidence interval for the population mean yearly premium is mathematically represented as

    \= x -MOE  <  \mu <  \= x +MOE

substituting values

   10800 -648.12  <  \mu <  10800 + 648.12

    10800 -648.12  <  \mu <  10800 + 648.12

   $10,151   <  \mu  $11448.12

The  largest sample needed is mathematically evaluated as

      n =  [\frac{Z_{\frac{\alpha }{2}    } *  \sigma }{\mu} ]

substituting values

       n =  [    \frac{ 2.58  *  1095}{225} ]^2

      n =  158

6 0
4 years ago
If sin theta = 2/3 and tan theta &lt;0 what is the value of cos theta?
Mrac [35]

Answer:

d) \cos(\theta)=-\frac{\sqrt{5}}{3}

Step-by-step explanation:

If   \sin(\theta)=\frac{2}{3} and \tan(\theta)\:, then

\theta is in quadrant 2.

Recall that;

\sin^2(\theta)+\cos^2(\theta)=1

We substitute the given sine ratio to obtain;

(\frac{2}{3})^2+\cos^2(\theta)=1

\frac{4}{9}+\cos^2(\theta)=1

\cos^2(\theta)=1-\frac{4}{9}

\cos^2(\theta)=\frac{5}{9}

\cos(\theta)=\pm \sqrt{\frac{5}{9}}

\cos(\theta)=\pm \frac{\sqrt{5}}{3}

We are in the second quadrant, therefore

\cos(\theta)=-\frac{\sqrt{5}}{3}

8 0
4 years ago
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