Question

Which number is a constant in the algebraic expression -x^2-6y+13x+7

Answer 1

Let's take a close look at x^2-6y+13x+7. Add the coefficient '1' in front of the first term: 1x^2-6y+13x+7.

The numerals {1, -6} are called "coefficients."
The final numeral, 7, stands alone. This is the "constant."

Answer 2

A constant is defined as a number without a variable attacted to it. SO in your problem, the answer would be 7