Answer:
circumference=πD
R=10
D=20
3.14*20
=68.2
Step-by-step explanation:
The correct answer should be $432.22
all angles of a triangle sum to 180
180 = 15x + 24x +21x
180=60x
solve for x
then substitute that for 24(x) to get the angle
2ax-6ay+bx-3by
2ax+bx -6ay-3by
x(2a+b) -3y(2a+b)
(2a+b) (x-3y)
