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stiv31 [10]
2 years ago
12

Help me please.I am in need of help HURRY!!​

Mathematics
2 answers:
skelet666 [1.2K]2 years ago
8 0

Answer:

AC = 10

Step-by-step explanation:

We can apply the properties of two secants intersecting outside a circle

(see attached for reference).

in our case, our formula will be

BC (BC + AB)   = CD  (CD + DE), which can be written as:

BC · AC = CD · CE

We are given:

BC = 6, DC = CD = 5, CE = 12

simply substitute the known values into the equation above

6 · AC = 5 · 12

AC = (5)(12) / 6

AC = 10

Svet_ta [14]2 years ago
5 0

Answer:

11

Step-by-step explanation:

(Note that the diagram is not to scale)

You know BC is 6

You know DC is 5

You know CE is 12

Using K's position, it shows that AC is one off from EC

AC=11

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Two functions are given below: f(x) and h(x). State the axis of symmetry for each function and explain how to find it.
Studentka2010 [4]

Answer:

Step-by-step explanation:

f

(

x

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−

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+

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Set the polynomial equal to  

y

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y

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(

x

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8

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2

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Use the vertex form,  

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−

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,  

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k

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a

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h

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k

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Since the value of  

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Opens Down

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.

(

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3

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Tap for more steps...

−

1

16

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(

8

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Find the axis of symmetry by finding the line that passes through the vertex and the focus.

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image of graph

3 0
2 years ago
Can someone plzz help me with this 86points
just olya [345]

Answer:I would do the same thing which is copy and paste because its very

difficult to find out how to do it but ill keep trying

Step-by-step explanation:

7 0
3 years ago
35% of f is 14. What is f? Enter your answer as a numeric expression.​
Nata [24]

Answer:

40

Step-by-step explanation:

14/35 = f/100

35f = 14 x 100

f = 14 x 100 /35

f = 40

7 0
2 years ago
Read 2 more answers
The average score of all golfers for a particular course has a mean of 75 and a standard deviation of 4. Suppose 64 golfers play
Vilka [71]

Answer:

0.0228 = 2.28% probability that the average score of the 64 golfers exceeded 76.

Step-by-step explanation:

To solve this question, we need to understand the normal probability distribution and the central limit theorem.

Normal probability distribution

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.

Central Limit Theorem

The Central Limit Theorem estabilishes that, for a normally distributed random variable X, with mean \mu and standard deviation \sigma, the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean \mu and standard deviation s = \frac{\sigma}{\sqrt{n}}.

For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.

In this problem, we have that:

\mu = 75, \sigma = 4, n = 64, s = \frac{4}{\sqrt{64}} = 0.5

Find the probability that the average score of the 64 golfers exceeded 76.

This is 1 subtracted by the pvalue of Z when X = 64.

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

By the Central Limit Theorem

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

Z = \frac{76 - 75}{0.5}

Z = 2

Z = 2 has a pvalue of 0.9772

1 - 0.9772 = 0.0228

0.0228 = 2.28% probability that the average score of the 64 golfers exceeded 76.

6 0
3 years ago
Threatened monarch butterflies are monitored by measuring the area occupied by overwintering butterflies in Mexico. According to
Pani-rosa [81]

Answer:

14.2 hectares

Step-by-step explanation:

Fund Mexico, monarch butterflies occupied 1.13 hectares one recent winter, and 4.01 hectares the following winter (one year later)

The formula of Geometric growth

(Pt/ Po)^1/t

Where Pt = Size after t years = 4.01 hectares

Po = Initial size = 1.13

t = times = 1

=( 4.01/1.13 )^1/1

= 3.5486725664

Hence, Geometric growth rate = 3.5486725664.

It's size in hectares after another 1 year = Current size in hectares × Geometric growth rate

= 4.01 ×3.5486725664

= 14.230176991 hectares

≈ 14.2

6 0
3 years ago
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