C = 4.95+1.25 with C = total shipping cost and n = number of calculators in a box

Ineed to know the rule for the sequence. plz !

To solve the system of equations below, grace isolated the variable y in the first equation and then substituted into the second equation. what was the resulting equation? 3y=12x x^2/4+y^2/9=1

Segment ab is shown on the graph. which shows how to find the x-coordinate of the point that will divide ab into a 2: 3 ratio using the formula