What is the answer to the music question.

Solve the system of equations below.4x+y=162x + 3y = -2

What are the two ways in which you can identify forms? cones and spheres are examples of (dark/artifical/geometric) forms, whereas mountains and trees are (natural/organic/light) forms.

The energy applied to cause vibration can be in the form of air pressure a stick, bow, or electricity. true or fasle