M=2/3n-c (solve for n) (i've tried adding -c to the left side and then dividing 2/3 (flip to 3/2) on the left side and i ended up with: 3/2(m+c)=n) if my answer isn't correct, explain what you did when solving it

Quick translate "x is 12 units from 20" into an equation. what are the values of x being described? if you can answer any of my other questions that'd be great too

1. are the triangles similar and if so why? what is the value of x? show your work.

The graph shows the distance y, in inches, a pendulum moves to the right (positive displacement) and to the left (negative displacement), for a given number of seconds x. how many seconds are required for the pendulum to move from its resting position and return? enter your answer in the box.