(7a-1)^2 please help me quickly

Paint color preference children adults total 0.6 0.77 liked new paint color disliked new paint color 0.4 0.15 0.23 total 1.0 1.0 1.0 which value for x completes the conditional relative frequency table by column?

Planning for the possibility that your home might get struck by lighting and catch on fire is part of a plan for ?

If the discriminant if a quadratic equation is 4 which statement describes the roots?