Mariko has an 1:80 scale-drawing of the floor plan of her house. On the floor plan, the dimensions of her rectangular living room are 1.78 inches by 2 1/2 inches. What is the area of her real living room in square inches?

Line l passes through points (0,4) and (3,6) what is the slope of a line that is parallel to line l -2/3 -3/2 2/3 3/2

The angle of a triangle are given as 6x,(x-3), and (3x+7). find x then find the measures of the angles

Mrs. morton has a special reward system for her class. when all her students behave well, she rewards them by putting 3 marbles into a marble jar. when the jar has 100 or more marbles, the students have a party. right now, the the jar has 24 marbles. how could mrs. morton reward the class in order for the students to have a party?