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Effectus [21]
3 years ago
15

A tree is 12 metres tall and casts a shadow 9 metres long. A building nearby casts a shadow that measures 21 metres. How tall is

the building? (Draw a picture, set up a proportion)
1) 16 m
2) 24 m
3) 21 m
4) 28 m
Mathematics
1 answer:
Ulleksa [173]3 years ago
8 0
The answer to this question is 16m
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Which expression is equivalent to the following complex fraction?
True [87]

Answer:

<h2>A. -2y+5x/3x-2y</h2>

Step-by-step explanation:

Given the complex fraction;

-\frac{2}{x} +\frac{5}{y} / \frac{3}{y} - \frac{2}{x} \\

First we will find the LCM of the numerator and the denominator as shown below;

\frac{-2y+5x}{xy} /\frac{3x-2y}{xy}

Then we divide both equation by multiplying the numerator by the reciprocal of the denominator as shown;

= \frac{-2y+5x}{xy} * \frac{xy}{3x-2y}  \\= \frac{-2y+5x}{3x-2y} \\

This gives the required answer

5 0
3 years ago
What is the GCF of 28 and 16
Margarita [4]
4 is your answer have a nice day
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Evaluate -6(x-2y) when x= -3 and y= -5<br> a. -42<br> b. 80<br> c. -80<br> d. -16
Vinil7 [7]
Simply substitute x for -3 and y for -5, creating the equation shown below:
     
     -6 (-3 - 2(-5) )
Now that you have your values set up, now you can do the math by starting off with Multiplying -2 by -5, which will get you 10. 

Now that you have the parenthesis simplified in the parenthesis, you can use the distributive property by multiplying all the numbers with -6, like so:
-6(-3+10)= 18 - 60, which simplifies to -42, in which (A) is your answer.
 
 
5 0
3 years ago
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For Xavier's lemonade recipe, 6 lemons are required to make 4 cups of lemonade. At what rate are lemons being used in cups of le
dusya [7]

Answer:

Since 6 lemons are used to make 4 cups of lemonade, then are used \frac{6}{4} =\frac{3}{2} of lemon per cup of lemonade, or are make \frac{4}{6}=\frac{2}{3} cups of lemonade per lemon.

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3 years ago
In the figure, find the perimeter of AABC.
erma4kov [3.2K]

Answer:C. 36

Step-by-step explanation: height is 12 base is 9

12^2+9^2= 144+81=225 sq rt of 225 =15

So 12+9+15=36

4 0
3 years ago
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