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Lyrx [107]
3 years ago
15

What is the answer please help

Mathematics
1 answer:
Paladinen [302]3 years ago
5 0
4 + 9 = 13
12 - 8 = 4
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80,40,20,10,__what the missing number
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5

Step-by-step explanation:

The sequence is a "/2 sequence", which means each number equals half of the previous one.

40 is half of 80.

20 is half of 40.

10 is half of 20.

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Find the number which when divided by 4 and increased by 12 is the same as when it is divided by 3 and decreased by 5
MatroZZZ [7]

Step-by-step explanation:

Let's make the number we're finding to be a. So, it says that it will be divided by 4 and then added by 12 if we want this in algebraic expression it will be \frac{a}{4} +12\\. It's also telling us that that expression is the same thing as our number divided by 3 and subtracted by 5. If we want an expression out of it it well be \frac{a}{3} -5\\. Since they are the same, we have the equation below.

\frac{a}{4} +12 = \frac{a}{3} -5\\

All we have to do now is to find a.

\frac{a}{4} +12 = \frac{a}{3} -5 \\ \frac{a +48}{4} = \frac{a -15}{3} \\ (3)(a +48) = (a - 15)(4) \\ 3a +144 = 4a -60 \\ (60 -3a) + 3a +144 = 4a -60 +(60 -3a) \\ a = 204

<h3>Answer:</h3>

Our number must be 204. I think

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4 years ago
Can someone help me, I really need help .​
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Yes I can help you with the question you have displayed
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