Triangle abc has been transformed into triangle a'b'c'. the algebraic formula for this transformation is  a) (x', y') = (2x, y)    b) (x', y') = (x, 2y)  c) (x', y') = (2x, 2y)  d) (x', y') = (2y, 2x)

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)