a=adult
c=child
a+c=214
c=214-a
9c+14a=2081
9(214-a)+14a=2081
1926-9a+14a=2081
5a=155
a=155/5=31
31 adults
183 children
check
31*14 = 434
183*9=1647
1647+434=2081
Answer:
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7.5 cm²
Step-by-step explanation:
Dimensions of the large ∆:
Dimensions of the small ∆:
Difference between the area of the large and the small ∆ = 13.5 - 6 = 7.5 cm²
h= -8/3
Picture Explanation:
<em><u>Hope this makes sense.</u></em>