Answer :
7.7 in
Explanation
Step 1
Let
AB=5.1( black)
BC=2.6(red)
AC=?
AC is the line that goes from A to C, (blue)
Also
[tex]AC=AB+BC[/tex]Step 2
replace
[tex]\begin{gathered} AC=AB+BC \\ AC=5.1+2.6 \\ AC=7.7 \end{gathered}[/tex]so, the answer is 7.7
