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goblinko [34]
3 years ago
10

Three student teams collected 65 books for the school library. The first team collected 10 fewer books than the second team and

the third team collected 30% of the number of books collected by first and second teams together. How many books did each team collect?
PLEASE HELP ME!
Mathematics
1 answer:
Feliz [49]3 years ago
5 0

Team 1 - x

Team 2 - y

Team 3 - z

x = y - 10

z =0.3(x+y)

x + y + z = 65

(y-10) + y + (0.3(x+y)) = 65

(y-10) + y + (0.3((y-10)+y)) = 65

y-10+y+(0.3(y-10)+0.3y)=65

2y-10+(0.3y-3+0.3y)=65

2y-10+0.6y-3=65

2.6y-13=65

2.6y=78

0.2y=6

2y=60

y=30 which is Team 2's books

x = y - 10

x=20-10

x=10 which is Team 1's books

z = 0.3(x+y)

z = 0.3(20+10)

z = 9 which is Team 3's books

Team 1 - 10

Team 2 - 20

Team 3 - 9

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MA_775_DIABLO [31]

Answer:

5b - 138

Step-by-step explanation:

Alright let's break it down.

First, you can see that each constant (5,126,7) have negatives in front of them. SO you are going to subtract each one of them.

When subtracting negatives it's basically just adding them together. How to do it is simply adding:

5 + 126 + 7

Then you get 138.

BUT, it was negative numbers. So it's actually -138.

Then bring back the 5b and your answer is:

5b - 138

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3 years ago
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a cone and a sphere have the same volume. the height of the cone is 96 units. what would be the values for the radius of the con
jolli1 [7]

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We know that V_c=V_s and that h_c=96

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4 years ago
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Answer:

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ETHANHUNT HELP HERE WOULD BE APPRECIATED
labwork [276]
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Hope this helps!
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sergiy2304 [10]
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