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ad-work [718]
3 years ago
13

Please answer ASAP will mark brainliest!! XŻ bisects The measurement of of X?

Mathematics
1 answer:
Yuliya22 [10]3 years ago
5 0

Answer:

x = 57

Step-by-step explanation:

XZ divides <WXY into two equal parts. Which implies that:

m<ZXY = m<ZXW

Therefore:

m<WXY = 2(m<ZXY)

m<ZXY = 58°

m<WXY = 2x + 2

Plug in the values into the equation

2x + 2 = 2(58)

2x + 2 = 116

2x = 116 - 2 (subtraction property of equality)

2x = 114

x = 114/2 (division property of equality)

x = 57

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The marketing director of a large department store wants to estimate the average number of customers who enter the store every f
Dahasolnce [82]

Answer:

36.5674\leq x'\leq61.4326

Step-by-step explanation:

If we assume that the number of arrivals is normally distributed and we don't know the population standard deviation, we can calculated a 95% confidence interval to estimate the mean value as:

x-t_{\alpha /2}\frac{s}{\sqrt{n} } \leq x'\leq x-t_{\alpha /2}\frac{s}{\sqrt{n} }

where x' is the population mean value, x is the sample mean value, s is the sample standard deviation, n is the size of the sample, \alpha is equal to 0.05 (it is calculated as: 1 - 0.95) and  t_{\alpha /2} is the t value with n-1 degrees of freedom that let a probability of \alpha/2 on the right tail.

So, replacing the mean of the sample by 49, the standard deviation of the sample by 17.38, n by 10 and t_{\alpha /2} by 2.2621 we get:

49-2.2621\frac{17.38}{\sqrt{10} } \leq x'\leq 49+2.2621\frac{17.38}{\sqrt{10} }\\49-12.4326\leq x'\leq 49+12.4326\\36.5674\leq x'\leq61.4326

Finally, the interval values that she get is:

36.5674\leq x'\leq61.4326

8 0
3 years ago
What is the solution to: 5(7) + 2(1/3) - 1/2(12) + 20?
antoniya [11.8K]
You can use a online calculator it really helps
7 0
3 years ago
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NemiM [27]

Solution

Step 1

Expand the brackets

8(9r-1) - 9(-8r + 2)

72r - 8 +72r -18

Step 2

Bring like terms together

72r + 72r -8 -18

Step 3

Sum and get the expression in its simplest for after factorization

144r -26

After factorization we will have in its simplest form the following answer

2 (72r -13)

8 0
1 year ago
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Answer:

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Step-by-step explanation: multiply all numbers to get your answer

6 0
3 years ago
To increase an amount by 19% multiple by?
seropon [69]
To increase an amount by 19% you need to multiple the amount by 1.19
3 0
3 years ago
Read 2 more answers
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