Anybody? It’s algebra

The frequency table shows the results of a survey comparing the number of beach towels sold for full price and at a discount during each of the three summer months. the store owner converts the frequency table to a conditional relative frequency table by row. which value should he use for x? round to the nearest hundredth. 0.89 0.90 0.92 0.96

Ineed someone to me answer my question i have to have this done and knocked out

Factor and solve to find roots x squared -x - 90 =0