Answer:
Part 1) [tex]x=7[/tex]
Part 2) [tex]EF=10\ units[/tex]
Part 3) [tex]FG=18\ units[/tex]
Step-by-step explanation:
see the attached figure to better understand the problem
step 1
Find the value of x
we know that
[tex]EG=EF+FG[/tex] ---> by addition segment postulate
we have
[tex]EG=28\ units\\EF=3x-11\\FG=4x-10[/tex]
substitute
[tex]28=(3x-11)+(4x-10)[/tex]
solve for x
[tex]28=7x-21[/tex]
[tex]7x=28+21[/tex]
[tex]7x=491[/tex]
[tex]x=7[/tex]
step 2
Find the value of EF
[tex]EF=(3x-11)[/tex]
substitute the value of x
[tex]EF=3(7)-11=10\ units[/tex]
step 3
Find the value of FG
[tex]FG=(4x-10)[/tex]
substitute the value of x
[tex]FG=4(7)-10=18\ units[/tex]