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BaLLatris [955]
3 years ago
13

The height of a scale model building is in 15 in.The scale is 5 in. to 32 in.Find the height of the actual building in inches an

d in feet.
Mathematics
2 answers:
White raven [17]3 years ago
5 0

Answer:

The answer is 8 feet or 96 inches.

Step-by-step explanation:

The height of a scale model building is in 15 in.

The scale is 5 in. to 32 in.

Let the height of the building be x

Relation forms;

\frac{5}{32} =\frac{15}{x}

=> 5x=32\times15

x = \frac{480}{5}

x = 96 inches.

As there, are 12 inches in a feet, we get \frac{96}{12}=8 feet as the answer.

Aneli [31]3 years ago
4 0

Answer:

91

Step-by-step explanation:

91

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R(x) = -0.21x^3 + x^2 - 8.1x - 3 for x= -1 and x = 2
Minchanka [31]

Answer:

r(-1) = 6.31 and r(2) = -16.88

Step-by-step explanation:

* Lets read the problem and solve it

- Evaluate means find the value, so evaluate r(x) means find the value

 of it at the given values of x

∵ r(x) = -0.21x³ + x² - 8.1x - 3

∵ x = -1 and x = 2

- Then find r(-1) by substitute x by -1 and find r(2) by substitute x by 2

# At x = -1

∴ r(-1) = -0.21(-1)³ + (-1)² - 8.1(-1) - 3  

∴ r(-1) = -0.21(-1) + (1) - 8.1(-1) - 3

∴ r(-1) = 0.21 + 1 + 8.1 - 3

∴ r(-1) = 6.31

# At x = 2

∴ r(2) = -0.21(2)³ + (2)² - 8.1(2) - 3  

∴ r(2) = -0.21(8) + (4) - 8.1(2) - 3

∴ r(2) = -1.68 + 4 - 16.2 - 3

∴ r(2) = -16.88

* r(-1) = 6.31 and r(2) = -16.88

3 0
3 years ago
SOMEONE HELP ????<br><br> Select steps that could be used to solve the equation 1+ 3x = -x+4
Alex

Answer:

a) add x , subtract 1 and divide by 4

The solution of given equation x = \frac{3}{4}

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

Given equation  1+3 x  = -x +4

                <em>  Add 'x' on both sides , we get</em>

                     1 + 3 x + x = - x + x +4

                     1 + 4 x  = 4

      <em>  Subtract '1' on both sides , we get</em>

<em>                     1+4 x -1 = 4 -1</em>

                         4 x = 3

<em>       Dividing '4' on both sides, we get</em>

                          \frac{4x}{4} = \frac{3}{4}

                          x = \frac{3}{4}

<u><em>Final answer</em></u>:-

<em>The solution of given equation </em>x = \frac{3}{4}<em></em>

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3 years ago
Subtracting decimals<br><br> 4 - 21
maw [93]

Answer:

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Step-by-step explanation:

It is basically subtracting 4 from 21 except the answer is negative

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What are the factor pairs that multiply to be 30 and has a sum of 13?
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Answer:

3 and 10

Step-by-step explanation:

3 plus 10 equals 13

3 times 10 equals 30

5 0
3 years ago
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