4x+3 5x 15 what is the value of x if the quadrilateral is a rhombus

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

Simplify a7/a4 a) 1/a3 b)-a/a2 c)a4/a3 d)a3

What is the missing step in this proof ?