Get it right I promise I will give brainlist answer ASAP

What can be said about the relationship between triangles and circles? check all that apply. a) many circles can be inscribed in a given triangle b) exactly one triangle can be inscribed in a given circle c) exactly one circle can be inscribed in a given triangle d) many triangular shapes can be circumscribed about a given circle

Which shows the correct solution of the equation 1/2a+2/3b=50, when b=30?

Solve the equation x/4 - 5= -8 -27 -12 -7 12