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2 years ago

WILL GIVE BRAINIEST!!

Mathematics

2 answers:

Snezhnost [94]2 years ago

7 0

Hm let's see the answer should be by the definition of isosceles triangle

stepladder [879]2 years ago

4 0

Answer: B. by the definition of isosceles triangle.

Step-by-step explanation:

<u>Definition of Isosceles triangle : </u>IT is a special kind of triangle that has two sides of equal length or two angles of equal measure.

Thus , if a isosceles triangle is given then its two sides must be congruent.

Given : WXY is an isosceles triangle.

Side WX and side YX are congruent <u>by the definition of isosceles triangle</u>.

Hence the correct answer is option B. " by the definition of isosceles triangle."

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A multiple-choice examination has 15 questions, each with five answers, only one of which is correct. Suppose that one of the st

Alex

Answer:

0.0111% probability that he answers at least 10 questions correctly

Step-by-step explanation:

For each question, there are only two outcomes. Either it is answered correctly, or it is not. The probability of a question being answered correctly is independent from other questions. So we use the binomial probability distribution to solve this question.

Binomial probability distribution

The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

$P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}$

In which $C_{n,x}$ is the number of different combinations of x objects from a set of n elements, given by the following formula.

$C_{n,x} = \frac{n!}{x!(n-x)!}$

And p is the probability of X happening.

A multiple-choice examination has 15 questions, each with five answers, only one of which is correct.

This means that $n = 15, p = \frac{1}{5} = 0.2$

What is the probability that he answers at least 10 questions correctly?

$P(X \geq 10) = P(X = 10) + P(X = 11) + P(X = 12) + P(X = 13) + P(X = 14) + P(X = 15)$

$P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}$

$P(X = 10) = C_{15,10}.(0.2)^{10}.(0.8)^{5} = 0.0001$

$P(X = 11) = C_{15,11}.(0.2)^{11}.(0.8)^{4} = 0.000011$

$P(X = 12) = C_{15,12}.(0.2)^{12}.(0.8)^{3} \cong 0$

$P(X = 13) = C_{15,13}.(0.2)^{13}.(0.8)^{2} \cong 0$

$P(X = 14) = C_{15,14}.(0.2)^{14}.(0.8)^{1} \cong 0$

$P(X = 15) = C_{15,15}.(0.2)^{15}.(0.8)^{0} \cong 0$

$P(X \geq 10) = P(X = 10) + P(X = 11) + P(X = 12) + P(X = 13) + P(X = 14) + P(X = 15) = 0.0001 + 0.000011 = 0.000111$

0.0111% probability that he answers at least 10 questions correctly

3 0

2 years ago

A museum has a wax sculpture of a historical village. The scale is 1.5:8. If the height of a hut in the sculpture is 5 feet, how

Oksi-84 [34.3K]

Let us say that x is the real height of the original hut, therefore we can establish the equation:

5 : x = 1.5 : 8

5 / x = 1.5 / 8

Solving for x:

x = 5 * 8 / 1.5

x = 40 / 1.5

4 0

3 years ago

Lonnie plans to join the gym. He must pay a $35 membership fee. He will

mash [69]

Answer:

Step-by-step explanation:

The slope will be the constant amount that the cost increases by each month.

In this situation, 5 is the slope, because he has to pay $5 each month.

35 is not the slope, and is instead the y intercept. This is because this is the cost at 0 months, since it is the membership fee.

So, the correct answer is 5.

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2 years ago

Assuming that Hamid’s revenue is found by multiplying the book price by the number of copies sold, create an equation (in standa

Vadim26 [7]

An equation of Hamid’s revenue by multiplying the book price by the number of copies sold is x = ny.

<h3>What is an equation?</h3>

The process of equating one thing with another.

Let Hamid’s revenue is $x and the price of book is $y.

If he sold n number of copies.

Then, the general equation will be x = n * y.

Therefore, an equation of Hamid's revenue will be x = ny.

Know more about equation here:

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5 0

1 year ago

Help please please i give bralienst don't need to explain just put the number

klasskru [66]

Answer:

487 ÷ 14

Hope that helps.

6 0

2 years ago

Read 2 more answers