Help me what is it brain lit who gets right

Adozen bananas weigh 3 pounds how many ounces does 1 banana weigh

Which shows the correct substitution of the values a,b and c from the equation 1=-2x+3x^2+1

Asmall business produces and sells balls. the fixed costs are $20 and each ball costs $4.32 to produce. each ball sells for $8.32. write the equations for the total cost, c, and the revenue, r, then use the graphing method to determine how many balls must be sold to break even.