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wel
3 years ago
11

1 point

Mathematics
1 answer:
Nana76 [90]3 years ago
3 0
Reflection over the y-axis
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The heights of american men aged 18 to 24 are approximately normally distributed with a mean of 68 inches and standard deviation
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A normal distribution is symmetrical about the mean. Therefore half of all young men are shorter than 68 inches.
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Running consumes about 720 calories per hour about how many are used if you run for 40 minutes
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288

Step-by-step explanation:

0.40hrs × 720 calories = 288 calories burned

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When did the U.S dollar become part of a total fiat system
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If the first chapter of a certain book is 16 pages long and makes up 4% of the book, how many pages does the entire book have?
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5 0
2 years ago
Amy received a $80 gift card for a coffee store. She used it in buying some coffee that cost $8.24 per pound. After buying the c
SVEN [57.7K]

Answer:

5 pounds

Step-by-step explanation:

Given that:

Amount of gift card = $80

Cost of coffee per pound = $8.24

Amount left in the card = $38.80

To find:

Number of pounds of coffee bought = ?

Solution:

Let the number of pounds of the coffee bought = x pounds

Cost of 1 pound = $8.24

Cost of x pounds = $8.24 \times x

Writing the equation as per question statement:

80 - 8.24x = 38.80\\\Rightarrow 80 - 38.80 = 8.24x\\\Rightarrow  8.24x = 41.2\\\Rightarrow x = \dfrac{41.2}{8.24}\\\Rightarrow \bold{x = 5\ pounds}

Therefore, 5 pounds of coffee was bought.

3 0
3 years ago
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