3 years ago

You find a sales receipt from a store that shows the total price as $40, and the total amount paid including sales tax as $42.

Mathematics

1 answer:

kenny6666 [7]3 years ago

3 0

42 = 40(x-1) + 40

x-1 will be equal to the sales tax rate in this equation.

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Answer:

Mia had $1554.84

Step-by-step explanation:

100% = $2468

1% = $ 24.68

100 - 37 = 63%

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Calvin's plane is flying at a speed of 600 miles per hour. If y represents the distance the plane has traveled and z represents

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3 years ago

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Answer:

$s^2 = 0.01$

Step-by-step explanation:

Given

Values: 9/5, 9/5, 2, 9/5

Required

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Sample variance is calculated using:

$s^2 = \frac{\sum (x_i - \overline x)^2}{n - 1}$

First, we calculate the mean

$\overline x = \frac{\sum x}{n}$

$\overline x = \frac{9/5 + 9/5 + 2 + 9/5}{4}$

$\overline x = \frac{7.4}{4}$

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$s^2 = \frac{\sum (x_i - \overline x)^2}{n - 1}$ becomes

$s^2 = \frac{(9/5 - 1.85)^2+(9/5 - 1.85)^2+(2 - 1.85)^2+(9/5 - 1.85)^2}{4 - 1}$

$s^2 = \frac{(-0.05)^2+(-0.05)^2+(0.15)^2+(-0.05)^2}{4 - 1}$

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<em>Hence, the variance is 0.01</em>

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3 years ago

jay spent 3/8ths of his life working for a company, if jay has been working for his current company for 15 years, how old is he

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Answer:

Step-by-step explanation:

if 3/8 equals 15 that means 1/8 equals 5 because 15/3=5. now if we multiply 5 by 8 then we get 40 years

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