The area of triangle is equal to 1/2 multiplied by base and height. In this case, height is equal to b - 3 and area is equal to 19 b. thus the equation is 19 b = 0.5 (b-3 ) b b is then equal to 41 units. h is b - 3 equal to 38 units.
So you basically put [x] in the equation [y=-x+4] and solve for y. Then you put y in the next box. Ordered pair means basically putting x and y right next to each other separated by a comma.
Hope it helps! Comment if you have any questions and have an amazing day!
