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Nastasia [14]
3 years ago
11

Within 3 hours, the temperature in Oceanside falls by 8 degrees. If the temperature is now at 67 degrees Fahrenheit, what was th

e temperature 3 hours ago?
Mathematics
1 answer:
mrs_skeptik [129]3 years ago
7 0

Answer: 75^{\circ}F

Step-by-step explanation:

Given

If the temperature falls by 8^{\circ} in 3 hours

Present temperature is 67^{\circ}F

The difference in temperature i.e.  

\Rightarrow \text{Previous Temperature}-\text{Present temperature}=8\\\Rightarrow \text{Previous Temperature}=8+67=75^{\circ}F

Temperature 3 hours ago is 75^{\circ}F

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2. Find the value of x and y rounded to the nearest tenth.
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Using relations in a right triangle, it is found that the values of x and y are given by: x = 24, y = 46.4, given by option a.

<h3>What are the relations in a right triangle?</h3>

The relations in a right triangle are given as follows:

  • The sine of an angle is given by the length of the opposite side to the angle divided by the length of the hypotenuse.
  • The cosine of an angle is given by the length of the adjacent side to the angle divided by the length of the hypotenuse.
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First, we start with the vertical line h that divides y, that is <u>opposite to an angle of 30º, with hypotenuse 34</u>, hence:

sin(30º) = h/34

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h = 17.

Then, h is opposite to an angle of 45º, while the hypotenuse is x, hence:

\sin{45^\circ} = \frac{17}{x}

x = \frac{17}{\sin{45^\circ}}

x = 24.

y is divided into two segments.

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Then:

\cos{30^\circ} = \frac{y_1}{34}

y_1 = 34\cos{30^\circ} = 29.4

\cos{45^\circ} = \frac{y_2}{24}

y_2 = 24\cos{45^\circ} = 17

Then, the value of y is given by:

y = y_1 + y_2 = 29.4 + 17 = 46.4.

More can be learned about relations in a right triangle at brainly.com/question/26396675

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