simplify: 3x + 5y - xy when x=7 and y=3

Answer 1

To simplify the expression 3x + 5y - xy when x = 7 and y = 3, we substitute the given values into the expression:

3(7) + 5(3) - (7)(3)

Simplifying further:

21 + 15 - 21

Combining like terms:

36 - 21

This results in:

15