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Firdavs [7]
3 years ago
12

Please help w geometry thanks babes 1-4 30pts

Mathematics
2 answers:
juin [17]3 years ago
8 0
1- Notice that it's a right triangle (inscribed in 1/2 circle)

Then 2x+3x-5 + 90°° =180°===> x=10°


2- the 2 cords are equal then the triangle is isosceles & one these angle is equal to 95/2 = 47.5°°. Then 2 x 47.5 + x=180 ==> x =85°

3- Internal angle to a cercle: 88°=(x°+44°)/2===>66°

4- External angle to a cercle: x° = (160°-15°)/2===>72.5°
katrin2010 [14]3 years ago
8 0

Answer:

1. x=10 degrees

2. x=85 degrees

3. 66 degrees

4. 72.5 degrees

Step-by-step explanation:

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A person must score in the upper 8% of the population on an IQ test to qualify for membership in MENSA, the international high-I
Cloud [144]

Answer:

A person must get an IQ score of at least 138.885 to qualify.

Step-by-step explanation:

Problems of normally distributed samples are solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the zscore of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this problem, we have that:

\mu = 115, \sigma = 17

(a). [7pts] What IQ score must a person get to qualify

Top 8%, so at least the 100-8 = 92th percentile.

Scores of X and higher, in which X is found when Z has a pvalue of 0.92. So X when Z = 1.405.

Z = \frac{X - \mu}{\sigma}

1.405 = \frac{X - 115}{17}

X - 115 = 17*1.405

X = 138.885

A person must get an IQ score of at least 138.885 to qualify.

5 0
3 years ago
Read 2 more answers
What are the measures of the two angles in the figure below?
Mumz [18]

Answer: answer is A. 80 degrees and 100 degree

Step-by-step explanation:

4 0
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Find two fractions that are not equivalent to 2/4 but that are equivalent to each other
kvasek [131]

Answer:

1/5 and 2/10

Step-by-step explanation:

4 0
3 years ago
In circle O, what is mArc A E?
posledela

Answer:

Option (3). 120° will be the answer.

Step-by-step explanation:

By using the theorem of secants intersecting externally,

Measure of angle formed by two secants, from a point outside the circle is half the difference of the measures of the intercepted arcs.

m∠C = \frac{1}{2}(m\widehat{AE}-m\widehat{BD})

36° = \frac{1}{2}(m\widehat{AE}-48)

72° = m\widehat{AE}-48°

m\widehat{AE} = 72 + 48

m\widehat{AE} = 120°

Therefore, Option (3) is the answer.

7 0
2 years ago
Prove that the expression A + B - C is equivalent to the expression C - B - A if A = 2x - 1, B = 3x + 1 and C = 5x.
zepelin [54]

Answer:

both are equal is 0

Step-by-step explanation:

After substituting, the answer is 0 to both

3 0
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