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Option 4:  A ║B

Step-by-step explanation:

Given the following statements:

is ⊥

is ⊥

We can apply the Lines Perpendicular to a Transversal Theorem, which states that if two lines intersect and are perpendicular to that same transversal, then those two lines are parallel.  

In the given conditional statement, ⊥  and   ⊥ , line is the transversal that cuts through both lines   and .  

Therefore, lines   and are perpendicular to line .  Hence, by the Lines Perpendicular to a Transversal Theorem,   ║ .  

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)