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allsm [11]
3 years ago
12

If you multiply the first equation by 6, the following

Mathematics
2 answers:
Harlamova29_29 [7]3 years ago
8 0

Answer:

the answer is add.

Step-by-step explanation:

adding -3x and 3x will eliminate them both.

erma4kov [3.2K]3 years ago
4 0

<u>Answer:</u>

ADD

<u>Explanation:</u>

We are given two equations, in which first is multiplied by 6. Multiplying or dividing the entire equation with the same number doesn't change the values of x and y.

So, now to solve this by elimination, we first have to make coefficient of any one variable equal then we either subtract or add the equations.

Since, the coefficients of x are equal and of opposite sign, we will add the equations which will give us the value of

y = 4 and substituting this value in any of the equations,

say in equation -3x + 2y = -2 ,

put y= 2, and

solve for x, we obtain

x = 2.

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4 years ago
Consider the probability that fewer than 26 out of 107 cell phone calls will be disconnected. Assume the probability that a give
anyanavicka [17]

Answer:

We assume the condition of independence satisifed.

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Step-by-step explanation:

Previous concepts

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".

Let X the random variable of interest, on this case we now that:

X \sim Binom(n=107, p=0.98)

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

We assume the condition of independence satisifed.

We need to check the following conditions in order to use the normal approximation.

np=107*0.98=104.86 \geq 10

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