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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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victus00 [196]
Decimals are always written with digits, what is your question?
7 0
3 years ago
Which ordered pair is a solution of the equation? − 7 x + 3 y = 2 −7x+3y=2
Viefleur [7K]

Answer:

Hello There. ☆~\---___`:•€`___---/~☆ The correct answer is C. Both (1,3) and (-2,-4).

To check whether (-2,-4) is a solution of the equation let's substitute x= -2 and y= -4 into the equation:

-7x+3y=2

-7*(-2)+3*(-4)=2

14-12=2

2=2

Do the same thing with (1,3)

-7x + 3y = 2

-7 * 1 + 3 * 3 = 2

-7 + 9 = 2

2 = 2.

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8 0
3 years ago
Claire says the expression 8x’has three terms: 8, x, and 3. Is she correct? Explain.
KatRina [158]

Answer:

No

Step-by-step explanation:

No because the 8x^3 is all one term since it is not separated by any signs.

8 0
2 years ago
A particular plant root grows 3.5 inches per month.How many centimeters is the plant growing each month?
STALIN [3.7K]

Answer:1 inch = 2.54 centimeters so the answer is 3.76

Step-by-step explanation:

(1 inch = 2.54 centimeters). 0.73 centimeters 1.38 centimeters 6.04 centimeters 8.89 centimeters unsubscribe · report · tue mathematics

5 0
2 years ago
Read 2 more answers
Check the image needed more words :p
Olin [163]
I got 16.8 , but she’ll need roughly 17 gallons of paint :)

how i did it :

1. so you know she’ll need 4/5 per book case, and there are 16 bookcases.
2. So you do 16 x 5, then you get 84
3. and you divide 84 by 5. and you’ll get 16.8, that’s how many gallons of paint she needs
6 0
3 years ago
Read 2 more answers
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