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motikmotik
3 years ago
9

A 6 foot tall person casts a shadow 8ft long at the same time a building can cast a shadow 48 feet long how tall is the building

Mathematics
1 answer:
aliina [53]3 years ago
5 0

Answer:

<em><u>36 feet</u></em>

Step-by-step explanation:

We can use the tall person's shadow as a ratio to help us witht his problem.

The ratio would be 6:8

Once we know how tall the shadow cast is, we can divide that by<em> 8</em> to be within the same ratio.

<u>48 / 8 = 6</u>

<u />

Then once we do that we multiply that by <em>6</em>

<u>6 x 6 = 36</u>

And there we go, that's the answer.

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What is the answer for 3r=10+5 when r=10
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Answer:

Step-by-step explanation:

What is the VALUE OF 3r=10+5 when r=10?

substitute 10 for r in 3r=10+5.  We get:

3(10) = 10 + 5, or 30 = 15.  This equation is FALSE when r = 10.

You could solve the equation for r, however:

3r=10+5 becomes 3r = 15, and so r = 5.  5 is a solution; 10 is not a solution.

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3 years ago
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Answer:

The standard form of the equation for this line can be:

l: 2x + 5y = -15.

Step-by-step explanation:

Start by finding the slope of this line.

For a line that goes through the two points (x_0, y_0) and (x_1, y_1),

\displaystyle \text{Slope} = \frac{y_{1} - y_{0}}{x_{1} - x_{0}}.

For this line,

\displaystyle \text{Slope} = \frac{(-1) - (-7)}{(-5) - 10} = -\frac{2}{5}.

Find the slope-point form of this line's equation using

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The slope-point form of the equation of a line

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should be l:\; y - y_{0} = m(x - x_0).

For this line,

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The equation in slope-point form will be

\displaystyle l:\; y - (-1) = -\frac{2}{5}(x - (-5)).

The standard form of the equation of a line in a cartesian plane is

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Multiply both sides of the slope-point form equation of this line by 5:

l:\; 5 y + 5 = -2x -10.

Add (2x-5) to both sides of the equation:

l: \; 2x + 5y = -15.

Therefore, the equation of this line in standard form is l: \; 2x + 5y = -15.

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3 years ago
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Step-by-step explanation:

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