Is there a way i can add graphs on here ?

David is spreading mulch on a triangular area of his flower bed. the coordinates of the vertices of the area are (1, 3), (9, 3), and (4, 6). what is the area of the triangle if each square has an area of 3 square feet?

Two times a number plus three times another number equals 4. three times the first number plus four times the other number is 7. find the numbers

Ineed with this problem 21 show steps