Answer:
[tex]\text{The value of }-3\sqrt{81}+\sqrt{16}\text{ is -23}[/tex]
Option A is correct
Step-by-step explanation:
Given the expression
[tex]-3\sqrt{81}+\sqrt{16}[/tex]
We have to simplify the above expression.
[tex]-3\sqrt{81}+\sqrt{16}[/tex]
[tex]\sqrt{81}=(9^2)^{\frac{1}{2}}=9[/tex]
[tex]\sqrt{16}=\sqrt{4^2}=4[/tex]
[tex]-3\sqrt{81}+\sqrt{16}[/tex]
[tex]=-3\times 9+4[/tex]
[tex]=-27+4[/tex]
[tex]=-23[/tex]
Hence, option A is correct.
