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2 years ago

Given the formula below, solve for x.

Mathematics

1 answer:

san4es73 [151]2 years ago

4 0

Answer:

Option (C)

Step-by-step explanation:

Given formula of a line passing through $(x_1, y_1)$ and slope 'm' is,

$y-y_1=m(x-x_1)$

Further solving this equation,

$y-y_1=mx-mx_1$ [By distributive property]

$y-y_1+mx_1=(mx-mx_1)+mx_1$ [By adding $mx_1$ on both the sides]

$y-y_1+mx_1=mx$

$\frac{y-y_1-mx_1}{m}=\frac{mx}{m}$ [Divide the equation by m]

$\frac{y-y_1}{m}-x_1=x$

Therefore, Option (C) will be the answer.

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2 years ago

A beetle is 1/5 inch wide and 2/5 inch long. How much greater is the beetle's length than its width?

Neporo4naja [7]

Answer:

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2 years ago

Jamal Buys a lunch special for $9.50And a dessert for $3.50. He wants to leave a tip that is about 15% of the bill. He estimates

sergey [27]

Answer:

His estimate is somewhat low.

Step-by-step explanation:

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2 years ago

A multiple choice test is composed of 10 questions. Each question has four possible answers, only one of the four possible answe

kompoz [17]

Answer:

Let X the random variable of interest "Number of correct anwers on the tet", on this case we now that:

$X \sim Binom(n=10, p=0.25)$

And the expected value is given by:

$E(X) = np =10*0.25 = 2.5$

Step-by-step explanation:

Previous concepts

A Bernoulli trial is "a random experiment with exactly two possible outcomes, "success" and "failure", in which the probability of success is the same every time the experiment is conducted". And this experiment is a particular case of the binomial experiment.

The binomial distribution is a "DISCRETE probability distribution that summarizes the probability that a value will take one of two independent values under a given set of parameters. The assumptions for the binomial distribution are that there is only one outcome for each trial, each trial has the same probability of success, and each trial is mutually exclusive, or independent of each other".

The probability mass function for the Binomial distribution is given as:

$P(X)=(nCx)(p)^x (1-p)^{n-x}$

Where (nCx) means combinatory and it's given by this formula:

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

Solution to the problem

Let X the random variable of interest "Number of correct anwers on the tet", on this case we now that:

$X \sim Binom(n=10, p=0.25)$

And the expected value is given by:

$E(X) = np =10*0.25 = 2.5$

4 0

2 years ago

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nikklg [1K]

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