Given that Marshall bought 32 ounces of mixed nuts, which are estimated to be 30% peanuts.
This means that the amount of peanut in the mixed nut is given by 0.3(32) = 9.6 ounces. Then x ounces of peanuts is added to the mixture, the new amount of peanut is 9.6 + x ounces and the new total amount of mixed nuts is 32 + x ounces.
Therefore, the expression that can be used to find the percentage of peanut concentration of the final mix if he adds x ounces of peanuts is given by (9.6 + x) / (32 + x) x 100%
