Ahahaha

can someone help me with Math?

a3+b6-3s=?

Agrocery store has 12 lb of trail mix that is 10% banana chips. the store's manager would like to add banana chips to bring the new mix up to 25% banana chips. write and solve a system of equations to find out how many pounds of banana chips manager needs to add.

How do i simply this expression (quadratic formula basis) on a ti-84 or normal calculator?

1.based of the diagrams what is the the value of x? 2.how would you verify your answer for x