3x+7y=-43, 7x-2y=-27
F(x) =x+5 if x < - 2
f(x)=2x+8
4x-3y=-24, 11x-y=-15
find radius of curvature and an equation for the circle of curvature of the curve r(t)= ti+sintj at the point(pi/2,1)
2x+2y/3=26, 3x-5y/6=6
x/2+y/5=5, y/2-x/3=3
3x+y=22, 6x-3y=9
45+34444=
b=2.5+a
8.2a+11.2b-5c=-10
9.7c-5b=10