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ycow [4]
3 years ago
11

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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Mia and her 3 friends had £2468 between them. If her 3 friends all got 37% each of that the money. How much would be left for Mi
Ivan

Answer:

Mia had $1554.84

Step-by-step explanation:

100% = $2468

1% = $ 24.68

100 - 37 = 63%

63 % = 63 × $24.68

= $1554.84

6 0
3 years ago
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
valentina_108 [34]
Y = distance
z = time
Rate = distance / time


8 0
3 years ago
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18 less than 14 times a is 80
miss Akunina [59]

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Ugo [173]

Answer:

s^2 = 0.01

Step-by-step explanation:

Given

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

Required

Calculate the sample variance

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}

\overline x = 1.85

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}

s^2 = \frac{0.0025+0.0025+0.0225+0.0025}{3}

s^2 = \frac{0.03}{3}

s^2 = 0.01

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

5 0
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
Oksana_A [137]

Answer:

40

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

6 0
3 years ago
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