I don’t really understand this can anyone explain this pls

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.

How long does it take natsumi to clean up after she is done? table: .area time30. 245. 2.7560. 3.5