Answer:
[tex] \huge{ \fbox{ \sf{3}}}[/tex]
Step-by-step explanation:
[tex] \underline{ \text{Given}} : [/tex]
[tex] \star{ \sf{ \: a= 51 \: , \: b= 15 \: ,c= 2 }}[/tex]
[tex] \underline{ \underline{ \sf{Let's \: evaluate \: the \: value \: of \: a \div (b + c)}}}[/tex]
[tex] \text{Step \: 1}:\sf{Substitute \: the \: value \: of \: a ,\: b \: \: and \: c}[/tex]
[tex] \mapsto{ \sf{51 \div (15 + 2}})[/tex]
[tex] \text{Step \: 2} : \sf{Add \: the \: numbers} : 15 \: and \: 2[/tex]
[tex] \mapsto{ \sf{51 \div 17}}[/tex]
[tex] \text{Step \: 3} : \sf{Divide \: 51 \: by \: 17}[/tex]
[tex] \mapsto{ \boxed{ \sf{3}}}[/tex]
Note : Follow the PEMDAS
Parentheses , Exponents , Multiplication , Division , Addition , Subtraction
Hope I helped!
Best regards! :D
~[tex] \sf{TheAnimeGirl}[/tex]