Five different books (a, b, c, d and e) are to be arranged on a shelf. books c and d are to be arranged first and second starting from the right of the shelf. the number of different orders in which books a, b and e may be arranged is
a. 5
b. 3
c. 2
d. 6

true

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)