Factor completely 49x^2 − 9.

A. (7x + 3)(7x − 3)
B.(7x + 3)(x − 3)
C. (7x − 3)(7x − 3)
D. (7x − 3)(x − 3)

Step-by-step explanation:

49x²-9

(7x)²-(3)²

(7x+3)(7x-3)

the amount you'd have after the work is $1.55

step-by-step explanation:

you subtract 95% from $31.

hope it you

step-by-step explanation:

sin(7pi/6 - pi/3)  

= sin(7pi/6 - 2pi/6)  

= sin(5pi/6)  

= sin(pi - pi/6)  

= sin(pi/6)  

= 1/2  

sin 7pi/6 - sin pi/3  

= sin (pi + pi/6) - sin pi/3  

= -sin pi/6 - sin pi/3  

= -1/2 - sqrt(3)/2  

= -(1+sqrt(3))2