Steven's school is selling chocolate bars to earn money for new band instruments. the school will receive 33% of the total sales; given by the model y = 0.33x; where x represents total sales. what is the meaning of the x-intercept in the model?

The x-intercept of the linear equation is the value of x when y is equal to zero. From the given equation above, 
                                 y = 0.33x
When y is zero, 
                                0 = 0.33x   ; x = 0
When y is zero, x is also zero. This means that the school will not receive any amount when they are unable to sell anything. 

If your asking how much altogether for 12 performance the answer will be 98,496.