Answer:
15 units²
Step-by-step explanation:
Hi there!
where <em>b</em> is the base and <em>h</em> is the height
Plug in the base (7.5) and height (4):

Therefore, the area of the triangle is 15 units².
I hope this helps!
Answer:
Right angles
Step-by-step explanation:
The opposite of 1/3 = -1/3
the opposite of -7/12 = 7/12
The answer is commutative property