Which expression best represents the difference between triple a number and double a number?
a. 3x-2x
b. 2x-3x
c. x3-x2
d. x2-x3

What is the simplified form of (3.25x10^3)(7.8x10^6) written in scientific notation?

We just started the introduction into circles and i have no idea how to do this.

The radius of the circle below intersects the unit circle at (3/5,4/5). what is the approximate value of theta? 0.6 radians 1.0 radians 36.9 degrees 53.1 degrees