Explain whether the following given sets are closed under addition: a. B ={0}
b. T = {0, 3, 6, 9, 12, . . . }
c .N = {1, 2, 3, 4, 5, . . .}
d. V = {3, 5, 7}

Step-by-step explanation:

a) Yes.

b) Yes

c) Yes

d) No

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)

sorry can't

step-by-step explanation:

i googled though and something came up but it was in science langueage not common english sooo