SOLUTION: Kailey is making earrings to sell at a local market. She spends $80 on supplies and decides to keep 4 pairs of earrings to give to her friends. Kailey sells the rest of the earring

Algebra ->  Finance -> SOLUTION: Kailey is making earrings to sell at a local market. She spends $80 on supplies and decides to keep 4 pairs of earrings to give to her friends. Kailey sells the rest of the earring      Log On


   

Question 1177892: Kailey is making earrings to sell at a local market. She spends $80 on supplies and decides to keep 4 pairs of earrings to give to her friends. Kailey sells the rest of the earrings she made for $175, making a profit of $9 per pair of earrings.
If n represents the number of pairs of earrings Kailey made, then an equation that represents this information is:

9=(175/n-4)-(80/n)
Identify all restrictions on the variable n in this context. (2 marks)
Found 2 solutions by MathLover1, ikleyn:
Answer by MathLover1(20849) About Me  (Show Source):
You can put this solution on YOUR website!

9=%28175%2F%28n-4%29%29-%2880%2Fn%29
restrictions on the variable+n:
as you can see, the variable+n is in denominator and denominator cannot be equal to zero
it will be be equal to zero if +n=0 or be equal to n-4=0=>
n=4
so, restrictions on the variable+n are: +n%3C%3E0 and n%3C%3E4

Answer by ikleyn(52781) About Me  (Show Source):
You can put this solution on YOUR website!
.

            The answer by @MathLover1 is incorrect.

            I came to bring the correct answer. 


The restrictions are:  n must be an integer number greater than 4.

Solved, answered, and completed.