Which of the following representations of DAL would allow someone to construct a triangle not congruent to DAL

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?

What is the solution to the equation? k/6.4=8.7 2.3 5.568 15.1 55.68

How is working backward similar to solving an equation?