Answer:
cos A = 12/13
Step-by-step explanation:
TanC = AB/BC = 2.4
therefore
BC = AB/2.4
Pythagorean theorem
AC = √(AB² + (AB/2.4)²) = (13/12)AB
Cos A = AB/AC = AB / (13/12)AB = 12/13
Step-by-step explanation:Did that help?
-2x+2y=-5 is equal to x=y+ 5 /2
5x- 6y =8 is equal to x= 6 /5 y+ 8 /5
