The expression x15·x-4 is equivalent to xp. What is the value of p?
To find the value of p, we need to simplify the expression x^15 * x^-4.
Using the property of exponents, x^a * x^b = x^(a+b), we can simplify the expression to x^(15 + (-4)).
15 + (-4) = 11, so the expression becomes x^11.
Therefore, p = 11.