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schepotkina [342]
3 years ago
14

What is 15/21 simplified?

Mathematics
2 answers:
Vera_Pavlovna [14]3 years ago
8 0
It is simplified to 5/7 because 21/3=7 which is your denominator and 15/3=5 which is your numerator
Zolol [24]3 years ago
5 0
You divide the numerator and the denominator by 3 as both numbers are in the 3 times table so the answer is 5/7
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One year, the population of a city was 352,000. Several years later it was 337,920.
kvasek [131]

hi

here is  the  method :

you take  Value 1  and Value 2

And you do :   ( Value 2 - Value 1)  / (Value 1 )    * 100

Here we have :    Value 1 = 352 000

                            Value 2 =  337 920

So now we apply :

( 337 920 - 352 000 )  /  ( 352 000)   * 100 =  -4  

Population decreased by by  4 %

You can also make :  

352 000 * X = 337 920

                 X =  337 920 / 352 000

                 X = 0.96

if  the multiplier is  0.96 ,  it's mean that we lost  1 -0.96 = 0.04  

which mean  - 4%

8 0
2 years ago
Which relationship is always true for the angles r, x, y, and z of triangle ABC?
mariarad [96]

That's the second one,


180 - x = r


Whenever two lines cross we get congruent opposite angles and supplemental adjacent angles, i.e. they add to 180 degrees.


The first one is almost right; we have r+y+z=180 and r+x=180 so x=y+z not quite what was written.


3 0
4 years ago
Pls I really need help with this question!!!!
pav-90 [236]
Answer: 43.6 (Rounded to the tenth)

Explanation: Use the method of: SOH CAH TOA.
Using TOA, T = Tangent.

tan(71) = x/15. Using the butterfly method you can just do the following equation:

15 tan(71) = 43.56 (Rounded to tenth) —> 43.6
4 0
2 years ago
What is the area of an equilateral triangle that has a perimeter of 36 centimeters? Round to the nearest square centimeter.
Vika [28.1K]

Answer:

(a is size of side of triangle)

the perimeter of equilateral triangle =3a

or, 36=3a

Thus, a = 13cm

area of equilateral triangle

=√3/4*(a^2 )

=√3/4*(13^2)

=73cm^2

5 0
2 years ago
Leda makes 73 oatmeal muffins for a bake sale. She accidentally drops five of them and throws them away. She puts as many of the
mamaluj [8]

Answer:

3 oatmeal muffins

Step-by-step explanation:

First, subtract the 5 muffins she dropped from the total:

73 - 5

= 68

Then, divide this by 13:

68/13

= 5.23

We need a whole number of muffins in each container, so round this down to 5.

This means that there can be 5 muffins in each of the 13 containers.

Find how many will be leftover:

5(13)

= 65

68 - 65

= 3

So, there will be 3 oatmeal muffins left

5 0
3 years ago
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