45 + 35n = 45 + 40n what is n?

Answers

Answer 1

Answer: Subtract 45 on both sides

35n = 40n

Divide n on both sides

35 = 40

This is obviously false, which means that this equation has no solution.

But wait! n = 0 is a solution.

35(0) = 40(0)
0 = 0

Answer 2

Answer: subtract both sides from 45
45+35n-45=45+40n-45
35n=40n
n=0

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Points, in case you need to ask a question.

The value of a book is $150 and decreases at a rate of 4% per year. Find the value of the book after 12 years

Answers

If it decreases at 4% every year, then its value becomes:

100% - 4% = 96% = 96/100 = 0.96

At the end of the 1 year its value becomes: 150*(0.96)

At the end of the 2 years its value becomes: 150*(0.96)*(0.96) = 150*(0.96)²

At the end of the 3 years its value becomes: 150*(0.96)*(0.96)*(0.96) = 150(0.96)³

So similarly at the end of 12 years, its value becomes 150*(0.96)¹²

=50*(0.96)¹² simplify with calculator.

≈ 91.91

Value at the end of 12 years becomes ≈ $91.91

I hope this helps.

Which of the following represent dividing 72 by 6?a. 72 ÷ 6
b. 6/72
c. 6 ÷ 72
d. 72/6