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Phantasy [73]
3 years ago
11

The sum of the digit of a certain two-digit number is 12. Reversing its digit increases the number by 36.find the number

Mathematics
1 answer:
Llana [10]3 years ago
3 0
Hello!

You can put down all the single digits that add to 12

3 + 9 = 12
4 + 8 = 12
5 + 7 = 12
6 + 6 = 12

The possible numbers are 39, 48, 57, or 66

You flip all the numbers and find out if it goes up by 36

93 - 39 = 54

It is not 39

84 - 48 = 36

Since it went up by 36 the answer is 48

The answer is 48

Hope this helps!
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Answer:

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Step-by-step explanation:

You are looking for the composite g(f(2)). The simplest way to solve this is to evaluate f(2) and enter the solution in to your g function.

g(f(2))=g(-(2)^2-2(2)+4)=g(-4-4+4)=g(-4)

g(-4)=4/(-4(-4)-2)=4/(16-2)=4/14=2/7

Therfor, g(f(2))=2/7  **I'm assuming the -4x-2 is all in the denominator of the g(x) function. If -2 is not in the denominator you would have

g(f(2))=4/(-4(-4)) -2=4/16 -2=1/4 -2=1/4-8/4= -7/4

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199. 

the z score for the 90th percentile is 1.28, so you can solve the equation

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