13500-1500= 12000/5=2400
12000-2400= 9600
$9600 most expensive painting
Answer: 30
Step-by-step explanation:
If we were to draw diagonal BD, then we would create two congruent triangles, and we could find the area of each using the formula
.
However, since there are two triangles, we can double this, giving us
.
So, the area is 