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scoray [572]
3 years ago
14

ILL GIVE BRAINLEST AND 50 PTS!

Mathematics
1 answer:
antoniya [11.8K]3 years ago
5 0

Answer:

dont yu multiply them all

Step-by-step explanation:

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The heights of adult men in america are normally distributed, with a mean of 69.1 inches and standard deviation of 2.65 inches.
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The solution for this problem is:It's given that the heights are normally distributed. 
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Two families visited an amusement park. The first family bought 2 hot dogs and 3 bottles of waters, which totaled $18. The secon
Ghella [55]

<u>Answer:</u>

$6.00

<u>Step-by-step explanation:</u>

To solve this problem, we have to construct two separate equations for each family, and then use any of the methods for solving simultaneous equations.

Let's consider <em>h </em>to represent the cost of 1 hot dog, and <em>w </em>to mean the cost of 1 water bottle.

• For the first family:

2h + 3w = 18

We can rearrange the equation to make <em>w</em> the subject:

⇒ 3w = 18 - 2h

⇒ w = \frac{18 - 2h}{3}

• For the second family:

4h + 2w = 28

Since we have previously obtained an expression for <em>w</em> in terms of <em>h</em>, we can substitute that expression for <em>w</em> in the above equation, and then solve for <em>h</em>:

⇒ 4h + 2(\frac{18 - 2h}{3}) = 28

⇒ 4h + \frac{36 - 4h}{3} = 28

⇒ 12h + 36 - 4h = 84      [Multiplying both sides of the equation by 3]

⇒ 8h + 36 = 84

⇒ 8h = 48

⇒ h = \bf 6

∴ The price of one hot dog is $6.00.

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