10. The difference between two negative numbers is always negative.

The negative of a negative is the opposite positive number  When you subtract a positive integer from a negative integer the difference is always negative . When you subtract two negative integers and the first integer (or minued) is larger than the second integer . The difference is positive .

Step-by-step explanation:

15

step-by-step explanation:

we are given the following expression and we are to solve it and find the product:

-13 × (-5)

solving the given expression in the standard order of solving a mathematical expression, beginning with the opening of brackets and then multiplying the terms and changing their signs.

-3 × -5 = 15 (answer is positive because when negative is multiplied with negative, it gives a positive answer)

i believe the answer is c.