Factor Completely: x^2 - 169
A) (x - 4)(x + 42)
B) (x - 13)(x + 13)
C) (x - 13)(x - 13)
D) (x + 16)(x - 10)

The answer is B

Step-by-step explanation:

As 169 is a perfect square of 13 and the formula is, a²-b² = (a+b)(a-b). Or you can try to expand it out :

(x+13)(x-13) = x² - 13x + 13x - 169

= x² - 169

(Hope you understand)

the equation cos(35) =a/25 can be used to find the length of bc what is the length of bc? round to the nearest tenth

step-by-step explanation:

answer: 48

just remember to use pemdas:

parentheses

expressions

multiplication

division

addition

subtraction