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gulaghasi [49]
3 years ago
10

Help will mark brainliest............

Mathematics
1 answer:
Nataliya [291]3 years ago
7 0
The answer is 90, Because angle D is a 90 degree angle, and 180- 90=90, so the answer is 90.
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Please help ASAP!!! Geometry:
nalin [4]

answer 22

beqause parallelograms are 180 ° = A + B = 90 ° AND AND C + D = 90° AND B = C , A= D then

A + B = 90° A= 68 THEN 68 + B = 90° = B = 90 ° - 68 ° = 22°

4 0
3 years ago
A large random sample was taken of body temperatures of women at a university. The data from the sample were normally distribute
ivanzaharov [21]

The best estimate of the proportion of all women at this university who have a body temperature more than 2 standard deviations above the mean is 2.28%.

Since the sample is normally distributed and has a mean μ = 98.52 F and a standard deviation, σ = 0.727 F and we need to find the percentage of all womenat this university who have a body temperature more than 2 standards deviations above the mean.

<h3>The normal distribution</h3>

Since the sample is normally distributed, 50% of the sample is below the mean. We have 34% of the sample at 1 standard deviation away from the mean and 47¹/₂% at 2 standard deviations above the mean.

<h3>Percentage below 2 standard deviations away from mean</h3>

So, the percentage below 2 standard deviations from the mean is 50% + 47¹/₂% = 97¹/₂%.

<h3>Percentage above 2 standard deviations away from mean</h3>

So, the percentage above 2 standard deviations from the mean is 100% - 97¹/₂% = 2¹/₂% = 2.5 %

Since 2.28 % is the closest to 2.5 % from the options, the best estimate is 2.28 %.

So, the best estimate of the proportion of all women at this university who have a body temperature more than 2 standard deviations above the mean is 2.28%.

Learn more about normal distribution here:

brainly.com/question/25800303

6 0
2 years ago
Help pls ! <br> i’ll mark brainliest to whoever answers it right first.<br> thanks !
Bess [88]
About 90ft

step-by-step explanation: 1/2 (a+b) x h is area of trapezoid. So that would be 40
then area of circle is pi x radius squared. So that is 50.24 roughly.

so 50+40=90

and yeah

hope this helped :))
7 0
3 years ago
Which of the following is a solution of x2 + 2x + 8?
zubka84 [21]
Using the quadratic equation we get:
\frac{ - 2 + - \sqrt{4 - 32} }{2} = \frac{ - 2 + - \sqrt{ - 28} }{2}

Factoring out 2 we get
\frac{ - 2 + - 2\sqrt{ - 7} }{2} = - 1( + - ) \sqrt{ - 7}
Factoring out the imaginary number:
- 1 + \sqrt{7} i \: (and) \: - 1 - \sqrt{7} i
So b.
4 0
2 years ago
Show me a graph that best represents the solution set to the system of a linear inequalities; y-x&gt;0. y-1&gt;0
tangare [24]
<h2>Answer:</h2>

The graph is shown in the attached image

4 0
3 years ago
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