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Ilia_Sergeevich [38]
3 years ago
15

A roofer needs to repair some shingles on the roof of a house, and uses a 12 foot ladder to reach the roof. In order to clear th

e bushes, the roofer puts the ladder 5 feet out from the side of the house. What is the height of the house from the ground to the beginning of the roof?
Mathematics
1 answer:
Contact [7]3 years ago
7 0

The height of the house from the ground to the beginning of the roof is about 10.92 feet

Step-by-step explanation:

In a right triangle, the relation between the hypotenuse and the two legs of it is c² = a² + b², where

  • a and b are the legs of the right angle
  • c is the hypotenuse

In the problem the ladder, the height of the house and the distance between the ladder and the height of the house formed a right triangle where the ladder is its hypotenuse, the height of the house and the distance between the base of the house and the base of the ladder are the legs of it

∵ The ladder is 12 feet

∴ c = 12

∵ The roofer puts the ladder 5 feet out from the side of the house

∴ a = 5

- We need to find the height of the house so let b represents

   the height of house

∴ b = the height of the house

- By using the relation above

∵ (12)² = (5)² + b²

∴ 144 = 25 + b²

- Subtract 25 from both sides

∴ 119 = b²

- Take √ for both sides

∴ 10.91 ≅ b

The height of the house from the ground to the beginning of the roof is about 10.92 feet

Learn more:

You can learn more about the Pythagoras theorem in brainly.com/question/1238144

#LearnwithBrainly

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Factor each number:
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7 is a common factor, and no other (except 1), so 7 is the greatest common factor (GCF) of 14 and 35.
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1. In a batch of 190 water purifiers, 12 were found to be defective. What is the probability that a
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The sum of the measures of angle x and y is 90. If the measures of angle x is 30 less than twice the measures of angle y what is
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First set up your two equations:

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8 0
3 years ago
Help it’s slope idk how to do it
Over [174]

a. \boxed{y-602=\frac{2}{3}(x-3)}

b. For every month the pine tree grows about 0.67 inches.

c. <em> </em>It represents the height of the tree at the moment Ariel started to record the heights.

<h2>Explanation:</h2>

<h3>PART A.</h3>

In this exercise we have that in July Ariel recorded the height of a pine tree and how quickly it was expected to grow in next several months. From the Table, we can get the following points:

P_{1}(3,602) \\ \\ P_{2}(6,604) \\ \\ P_{3}(q,606) \\ \\ P_{4}(12,608)

It is obvious that this problem follows a linear equation, so our goal is to find the equation that matches the Table.

The point slope form of the equation of a line is:

y-y_{1}=m(x-x_{1}) \\ \\ Where: \\ \\ m:Slope \\ \\ (x_{1}, y_{1}):A \ point \ on \ the \ line

Finding (m):

Using: \\ \\ P_{1}(x_{1},y_{1}) \rightarrow P_{1}(3,602) \\ \\  P_{2}(x_{2}, y_{2}) \rightarrow P_{2}(6,604) \\ \\ m=\frac{y_{2}-y_{1}}{x_{2}-x_{1}}=\frac{604-602}{6-3} \\ \\ m=\frac{2}{3}

Finally, the equation of the line is:

(x_{1}, y_{1}) \rightarrow (3,602) \\ \\ \boxed{y-602=\frac{2}{3}(x-3)}

<h3>PART B.</h3>

In this case, we have that:

  • The x-axis represents the <em>Number of Months </em>the pine tree was expected to grow.
  • The y-axis represents the <em>Height  of the Tree </em>in inches.

Since the slope o a line is:

Slope=\frac{Change \ in \ y}{Change \ in \ x}=\frac{2}{3}

Then, this means that<em> every three months the pine tree grows two inches, </em><em>or </em><em>for every month the pine tree grows about 0.67 inches.</em>

<h3>PART C.</h3>

The y-intercept can be found setting x=0. So, from our equation:

y-602=\frac{2}{3}(x-3)} \\ \\ \\ If \ x=0: \\ \\ y-602=\frac{2}{3}(0-3) \\ \\ y-602=-2 \\ \\ Solving \ for \ y: \\ \\ y=602-2 \\ \\ y=600

So the y-intercept is y=600 and<em> represents the height of the tree at the moment Ariel started to record the heights.</em>

<h2>Learn more:</h2>

Slope Intercept form: brainly.com/question/4192440

#LearnWithBrainly

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