Determine whether the sequence is arithmetic, geometric, or neither -1, 4, -7, 10

Use the x-intercept method to find all real solutions of the equation.x^3-10x^2+27x-18=0

Due to financial difficulties the owner of 4 skateboard stores is going to close 2 of his stores. based on the money earned at each store, which two stores should remain open?

Geometry triangles(ignore the handwriting)