how to figure out the cost of goods when one item is twice as much as the other item and you know total math problem grade school

Ahyperbola centered at the origin has a vertex at (-6,0) and a focus at (10,0)

Which shaded region is the solution to the system of inequalities? y y[tex]\geq[/tex]-x+1

Barrett is comparing the membership fees for two museums.the art museum charges a one-time fee of $8.25 plus $2.25 per month. the science museum charges a one-time fee of $10.75 plus $3.50 per month. how much does barrett save by joining the art museum instead of the science museum?