It could be B but I want to say D because it relates more to the question.
You have to add 10 last.
divide 75÷8 and then add 10
Total purchase she did : $20.90+$18.95=$39.85
7% tax means that we have to 7% or (7/100) extra
7% X 39.85= 2.79
total pay: 39.85+2.79=42.64
total cash: $50
what she gets back: 50-42.64=7.36
By the fundamental theorem of algebra, we can write

Expanding the right hand side, we get

We want
to be an integer, which means
must also be integers. This means
must be factors of 10. There are several possibilities:


So there are 4 possible values for
: -11, -7, 7, and 11.