Luhn mod 10 how to do it

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LUHN formula (modulus 10)

1. Beginning with the second digit from the end (on the right), take every other digit and multiply it by two.

2. Proceeding right to left, take each of the digits skipped in step 1 and add them to the result digits from step 1.

3. Subtract the result obtained in step 2 from the next higher number that ends in 0.

I hope it's helpful

step-by-step explanation:

let's assume

number of candles set =x

price of of x candles =p(x)

we are given

a candle maker prices one set of scented candles at $10 and sells an average of 200 sets each week

so, we get point as (200,10)

he finds that when he reduces the price by $1, he then sells 50 more candle sets each week

so, we can find slope

now, we can use point slope form of line

now, we can plug values

we can use point

and find b

now, we can plug it back

and we get

now, we can find revenue

we know that

revenue = price*quantity

so, we get

2 1/2 feet

step-by-step explanation: