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3 years ago

Thanks for any help from the people who may have answered!

Mathematics

2 answers:

sergij07 [2.7K]3 years ago

8 0

Answer:

m = $7.45 + $22.35

$22.35 - m = $7.45

Illusion [34]3 years ago

5 0

Answer:

m = $7.45 + $22.35

and

$22.35 - m = $7.45

Step-by-step explanation:

$22.35 - m = $7.45 and m = $7.45 + $22.35 are the same equations, just rearranged/

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The temperatures (in degrees Fahrenheit) in Long Island recorded by the weather bureau over a week were 42, 49, 53, 55, 50, 47,

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Step-by-step explanation:

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The monthly electrical utility bills of all customers for the Far East Power and Light Company are known to be normally distribu

omeli [17]

Answer: 0.9996

Step-by-step explanation:

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Sample size : n=100

Let X be the random variable that represents the electricity utility bill for a randomly selected month .

z-score : $z=\dfrac{X-\mu}{\dfrac{\sigma}{\sqrt{n}}}$

For X = $75.00

$z=\dfrac{75.00-87.00}{\dfrac{36}{\sqrt{100}}}\approx-3.33$

Now, the probability that the average bill for those sampled will exceed $75.00 will be :-

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3 years ago

The area of a rectangle is 18 square centimeters, and its perimeter is 22 centimeters. Find the dimensions of the rectangle.

Softa [21]

Answer:

2, 9, 2, 9

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length = x

width = y

xy = 18

2x + 2y = 22

Substitute the second equation into the first. to do that, rewrite the equation

2x + 2y = 22 becomes y = -x + 11

Then use the new equation and substitute it with the y in the first equation.

x(-x + 11) = 18

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Divide by -1

x^2 -11x + 18 = (x - 2) (x - 9)

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when x = 2, y = 9 and when x = 9, y = 2 so they are interchangeable. the sides are 2, 9, 2, and 9.

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4 years ago