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lubasha [3.4K]
3 years ago
11

A bag contains 140 balls of various colours. If 30 red balls are added to the bag the proportion of red balls in the bag is doub

led. How many red balls were in the bag to begin with?
​
Mathematics
1 answer:
Elodia [21]3 years ago
8 0

Answer:

30

Step-by-step explanation:

because in order for something to double you need it times 2 or add itself together like 30+30 is 60 and that just doubled the original number 30

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A square and a rectangle have the same perimeter. The square has a side length of 8x units. The rectangle has a length of (5x+8)
nevsk [136]

Answer:

The perimeter of both figures is equal to 64\ units

Step-by-step explanation:

step 1

we know that

The perimeter of a square is equal to

P=4b

where

b is the side length of the square

we have

b=8x\ units

substitute

P=4(8x)=32x\ units

step 2

we know that

The perimeter of a rectangle is equal to

P=2(L+W)

we have

L=(5x+8)\ units

W=(14)\ units

substitute

P=2(5x+8+14)=10x+44\ units

step 3

Equate both perimeters and solve for x

10x+44=32x

32x-10x=44

22x=44

x=2\ units

step 4

Find the perimeter of both

<em>square</em>

P=32x=32(2)=64\ units

<em>rectangle</em>

P=10x+44=10(2)+44=64\ units

6 0
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Answer:

1) 31.1

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Step-by-step explanation:

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3 years ago
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alexira [117]

Answer:

<h2><u><em>92.16</em></u></h2>

Step-by-step explanation:

(-41.8 + 32.2)² =

(-9.6)² =

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4 0
2 years ago
Read 2 more answers
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