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11Alexandr11 [23.1K]
3 years ago
7

Which of the following steps would you perform to the system of equations below so that the equations have equal x-coefficients?

Mathematics
2 answers:
KatRina [158]3 years ago
6 0

Answer: A) Multiply both sides of the top equation by 2.

Step-by-step explanation: The x-coefficient of the first equation (the number that is next to the x) is 4, and the x-coefficient of the second equation is 8, in order to them to be equal, we need to multiply the first equation by 2 (both sides), so the correct answer is the corresponding to option A, the equations would be:

8x+4y=8 first equation (after multiply it by 2)

8x-y=18 second equation

12345 [234]3 years ago
5 0

<u>The answer is A. Multiply both sides of the top equation by 2</u>

So since we know that 4 × 2 = 8, it would only make sense to multiply both sides by 2 so that the top equation has the x coefficient be 8.

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Answer:

a

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May you help me with this question please
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Answer:

<em>Option C</em>

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Graph 3 is the only one that matches with the inequality provided to us.

* Note that shaded circles are represented by a greater / less than or equal to, and non - shaded circles are represented by a greater / less than sign.

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confidence interval for the mean battery life in the new model is [7.9489, 8.3045].

What is confidence interval ?

A confidence interval, in statistics, refers to the chance that a population parameter can fall between a collection of values for an exact proportion of times.

Main body:

Formula for confidence interval is =

CI = x- bar ± z*s/√n            where,

CI = confidence interval

x- bar = sample mean

z = confidence level value

{s} = sample standard deviation

{n} = sample size  

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n = 6

mean = (8.23+7.89+8.14+8.25+8.30+ 7.95)/6

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C.I. = 8.127 ± 1.96 * 0.22/√6

C.I. = 8.127 ± 0.1781

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Hence correct option is A.

To know more about confidence interval , visit:;

brainly.com/question/15712887

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