10% off means the jeans will sell for 90% of the original price ( 100% - 10% = 90%)
Multiply the original price by 90%
65.00 x 0.90 = 58.50
He will pay $58.50
You do in fact get a negative number so the solutions are not real but imaginary. Good!
Set A:
1. 1 1/2 - closest to 1
2. 11/24 - closest to 1/2
3. 3/16 - closest to 0
4. 11/24 - closest to 1/2
5. 8/15 - closest to 1/2
6. 49/60 - closest to 1
7. 1 1/10 - closest to 1
8. 31/60 - closest to 1/2
Set B:
1. Common denominator = 10
2. Common demoninator = 18
3. Common denominator = 28
Here the expression is 11 to the second power over 1331 .
Which can be expressed as

And 1331 is the cube of 11, that is

In case of division , we have to use quotient rule and subtract the powers, that is

Now we need to make the power positive and for that we have to flip the term. That is

The point of intersection of all 3 altitudes