Respuesta :
Answer:
Part 1) The value of x is 5
Part 2) The length of line AB is 5 inches
Part 3) The length of BC is 15 inches
Step-by-step explanation:
see the attached figure to better understand the problem
Part 1) Find the value of x
we know that
[tex]AC=AB+BC[/tex] -----> equation A
we have
[tex]AB=x\ in[/tex]
[tex]BC=3x\ in[/tex]
[tex]AC=20\ in[/tex]
substitute the values in the equation A and solve for x
[tex]20=x+3x[/tex]
[tex]20=4x[/tex]
[tex]x=5[/tex]
Part 2) Find the length of line AB
we know that
[tex]AB=x\ in[/tex]
substitute the value of x
[tex]AB=5\ in[/tex]
Part 3) Find the length of BC
we know that
[tex]BC=3x\ in[/tex]
substitute the value of x
[tex]BC=3(5)=15\ in[/tex]
Answer:
Part 1) The value of x is 5
Part 2) The length of line AB is 5 inches
Part 3) The length of BC is 15 inches