How do I factor the expressions 15a-13a, -6x - 18y, and 36abc+54ad?

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

The base of a triangle exceeds the height by 7 centimeters. if the area is 400 square centimeters, find the length of the base and the height of the triangle.

Paul’s car is 18 feet long. he is making a model of his car that is 1/6 the actual size. what is the length of the model?