What is the solution to the equation?
3
13.
+ x =
Please help me with this

Roger and natalie travel in similar cars. roger's car drives the two miles to school in 7.5 minutes. natalie drives the same distance in the opposite direction but in only 6.5 minutes. what is true of their velocities?

Ten times the square of a non-zero number is eqaul to ninety times the number

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