Which statement about the following equation is true
2x2-9x2=-1

Tom had a total of $220 and he spent $35 on a basketball ticket . what percent of his money did he have left?

Suppose that one doll house uses the 1 inch scale, meaning that 1 inch on the doll house corresponds to 1/2 foot for life-sized objects. if the doll house is 108 inches wide, what is the width of the full-sized house that it's modeled after? in inches and feet.

Is the figure congruent? yes or no?