Answer:
.
Step-by-step explanation:
Answer:
A= 30
Step-by-step explanation:
A= a+b over 2
h= 5+15 over 2 times that by 3 to get 30
Answer:

Step-by-step explanation:

Answer:

Step-by-step explanation:
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Answer:
5a^2
Step-by-step explanation:
5ax5a=5a^2