Answer:
5
Step-by-step explanation:
Fill in the values and solve the resulting linear equation.
[tex]A=\dfrac{1}{2}h(b_1+b_2)\\\\16=\dfrac{1}{2}\cdot 4\cdot(3+b_2) \quad\text{fill in given values}\\\\8=3+b_2 \quad\text{divide by 2}\\\\5=b_2 \quad\text{subtract 3}[/tex]
