Answer: The customer will pay 90% of the retail price.
Explanation: 10% discount off the retail price means this. If there was a number like how much the retail price is we can solve this with a problem and a solid answer.
It is not possible. Since one of the angles has to be a right angle, the other two angles would have to add to 90. Therefore, neither of these angles can be more than 90 degrees.
I believe the correct choice is B. I know that you have to combined the like term's but in this case their are nun so you would do the greatest root and decrees to the right