Answer:1
Step-by-step explanation: A = h(b 1+b 2)
16=4(3+b2)
16/4=3+b2
4=3+b2
B2 =4-3=1
Step-by-step explanation: substitute all the corresponding terms so you get, 16=4(3+b2)
Then you multiply and get 16=12+4b2 then subtract 12 from both sides to get 4=4b2 and then divided both sides by 4 and you get 1=b2
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