the sum of two distinct numbers is equal to the difference or the two numbers what is the product of the two numbers

0

Step-by-step explanation:

a + b = a - b

this can only be true, if one of these two numbers is 0 (in this case b, as b = -b, which is only true for b = 0).

the other one then can be of any value, as any number + 0 is equal to the same any number - 0.

now, as one of the 2 numbers has to be 0, the product of these two numbers has to be 0.

$20.01

step-by-step explanation:

the sale price is (1.00 - 0.77)($87), or 0.23($87), or $20.01.

i believe the correct answer is b.