Answer:
10
Step-by-step explanation:
The y-intercept for each line is...
y=2x+7 (0, 7)
y=2x-3 (0, -3)
Note this is because...
y=mx+b
b represents the y-intercept
Using the distance formula...
[tex]d=\sqrt{(x_2-x_1)^2+(y_2-y_1)^2[/tex]
[tex]d=\sqrt{(0-0)^2+(7-(-3))^2[/tex]
[tex]d=\sqrt{0+(10)^2[/tex]
[tex]d=\sqrt{0+100}[/tex]
[tex]d=\sqrt{100}[/tex]
[tex]d=10[/tex]
