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3 years ago

GETS BRAINLIEST

Mathematics

2 answers:

bija089 [108]3 years ago

8 0

Answer:

Step-by-step explanation:

lutik1710 [3]3 years ago

7 0

Answer:

Being a student and preferring “shark” are not independent events

Step-by-step explanation:

Let A be the event that the selected person is a student and B the event that person prefers sharks.

Total number of students =100

Hence P(A) = $\frac{100}{115} =0.8696$

P(B) = Persons who prefers sharks /total persons

= $\frac{95}{115} =0.8261$

P(AB) = no of persons who are students and who prefer sharks/total persons

= $\frac{90}{115} =0.7826$

P(A)P(B) = $=0.8696*0.8261\\\\=0.7183$

Since P(AB) does not equal P(A) P(B), we find that

A and B are not independent.

Being a student and preferring “shark” are not independent events

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Answer:

115.38 divided by 8 equals 14.4225

Step-by-step explanation:

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3 years ago

Points P and Q belong to segment AB . If AB = a, AP = 2PQ = 2QB, find the distance: midpoints between AP QB

Digiron [165]

Answer: The distace between midpoints of AP and QB is $\frac{a}{8}$ .

Step-by-step explanation: Points P and Q are between points A and B and the segment AB measures a, then:

AP + PQ + QB = a

According to the question, AP = 2 PQ = 2QB, so:

PQ = $\frac{AP}{2}$

QB = $\frac{AP}{2}$

Substituing:

AP + 2*( $\frac{AP}{2}$ ) = a

2AP = a

AP = $\frac{a}{2}$

Since the distance is between midpoints of AP and QB:

2QB = AP

QB = $\frac{AP}{2}$

QB = $\frac{a}{2}*\frac{1}{2}$

QB = $\frac{a}{4}$

MIdpoint is the point that divides the segment in half, so:

<u>Midpoint of AP</u>:

$\frac{AP}{2} = \frac{a}{2}*\frac{1}{2}$

$\frac{AP}{2} = \frac{a}{4}$

<u>Midpoint of QB</u>:

$\frac{QB}{2} = \frac{a}{4}*\frac{1}{2}$

$\frac{QB}{2} = \frac{a}{8}$

The distance is:

d = $\frac{a}{4} - \frac{a}{8}$

d = $\frac{a}{8}$

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3 years ago

How do you solve right triangles in trigonometry

Ann [662]

In trigonometry, to solve right triangles, we use sine, cosine, and tangent (their definitions, and the laws of sine and cosine) to help us fill in the blanks. Do you need more information (I'm rusty on law of sines and law of cosines, but pretty fresh on definitions and identities).

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3 years ago

3. The figure shows a rectangle with a width of 3k inches. The length of the rectangle is 5 inches longer than the width.

erica [24]

Answer: I think the correct answer is A

Step-by-step explanation:

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3 years ago

NEED HELP RN!!!!!

Kazeer [188]

Answer:

4(2n-5)

Step-by-step explanation:

So we know Valerie has 5 less than double the number of brad's books. Brad has n books, so make that 2n to double it.

Because she has 5 less than that, the expression is now 2n-5. The is the total of Valerie's books.

We know that Brad has 4 times the number of Valerie's books, so just multiply that expression by 4.

The final answer is 4(2n-5).

You're welcome. :)

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4 years ago