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notsponge [240]
3 years ago
8

Please Help!!!! 15 Points!!!!! I don't know if I have the right answer.....

Mathematics
1 answer:
AlekseyPX3 years ago
6 0

Answer:

Yes it is right

Step-by-step explanation:

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3/5 of the class were boys. The teacher divided the boys equally into groups so the each group of boys had 1/10 of the number of
Lana71 [14]
I think boys =18
          girls=12
boys :x
girls:y
student:z
the number of group for the boys :n
the numberof group for the girls :m
so x=(3/5)*z
    y=(2/5)* z
x/y=3/2
3y-2x=0
(1/10)*z*n=(3/5) *z
so n=6
(1/5)*z*m=(2/5)* z
put x=(1/10)*z*6
    y=(1/5)*z*2
 into 3y-2x=0 and z=30
 z=30 so x=(1/10)*30*6=18
               y=(1/5)*30*2=12


4 0
3 years ago
3 discounts of30% ,35%, and 20% are applied to an item what will be thetotal percent markdown?
kobusy [5.1K]

Answer:

85%

Step-by-step explanation:

We have 30, 35, and 20.

Your question is asking what the total percent is. Since these percents are all on only a single item, we can just add them together.


30 + 30 = 60

60 + 25 = 85

There we go! 85%

<u>Brainliest</u> would be awesome.

Your Welcome, and thanks in advance.

6 0
3 years ago
What is Z 2(2z -4)=4
Pachacha [2.7K]

Answer:

z=3

Step-by-step explanation:

2(2z -4)=4

Divide by 2

2/2(2z -4)=4/2

2z-4 = 2

Add 4 to each side

2z-4+4 = 2+4

2z = 6

Divide by 2

2z/2 = 6/2

z=3

6 0
3 years ago
Will mark brainiest
stealth61 [152]
3+3+3+4+4+5+6+6+7+9+9=59
59/11=5.36
so your mean is 5.36
3 0
3 years ago
Read 2 more answers
Please help me with this
swat32

Answer:

The answer is 156.25π or about 490.625

Step-by-step explanation:

To find the area of a circle, you use the formula πr² (pi times radius times radius.) The radius is 12.5, so you plug it in to the equation. Once you plug the radius into the equation, you get π times 12.5 times 12.5. This simplifies to 156.25 times pi. If you want to use 3.14 as pi, the final answer is about 490.625. I hope this helps and that you have an fantastic day!!! Hope you stay safe!!!

6 0
3 years ago
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