Let x be the number of CDs we buy and y the number of CDs we sell.
Each CD sell for $1.5, then the total of money we earn is $1.5y.
Each CD bought for $5, then the total money spent is $-5x
Add the above values like this:
1.5y-5x
We have $20, add them like this:
1.5y-5x+20
Since we want to have<span> at least $10 left when you leave the store, then
we deduce the equation:
</span>
Answer:
Step-by-step explanation:
y=1/2-5x
P = 4s
P = (120)^1/2
4s = sqrt120
s = sqrt120/4
A = 2s
2*sqrt120/4 = sqrt120/2
Number 5 is the square root of 120 divided by 2