2 years ago

In your own words,define a system of equations

Mathematics

1 answer:

lesya692 [45]2 years ago

8 0

First you solve for X then substitute the number you got for X and then solve for Y.

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The sides of a right triangle containing the right angle are (5x) cm and (3x - 1) cm. If the area of the triangle be 60 cm, calc

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M x+ B = y solve for B A x+ B y = C solve for x Bh/2 = A, solve for h

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Step-by-step explanation:

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2 years ago

pH measurements of a chemical solutions have mean 6.8 with standard deviation 0.02. Assuming all pH measurements of this solutio

aalyn [17]

Answer: 2.14 %

Step-by-step explanation:

Given : pH measurements of a chemical solutions have

Mean : $\mu=6.8$

Standard deviation : $\sigma=0.02$

Let X be the pH reading of a randomly selected customer chemical solution.

We assume pH measurements of this solution have a nearly symmetric/bell-curve distribution (i.e. normal distribution).

The z-score for the normal distribution is given by :-

$z=\dfrac{x-\mu}{\sigma}$

For x = 6.74

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For x = 6.76

$z=\dfrac{6.76-6.8}{0.02}=-2$

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$P(z$

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Hence, the percent of pH measurements reading below 6.74 OR above 6.76 = 2.14%

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