8. x = 0, y = 14
[tex]8x+14= 4x+14[/tex]
subtract 14 from both sides
[tex]8x=4x[/tex]
The only way this can be true is if x is zero
Now to find y, use substitution:
[tex]y=8(0)+14\\y=0+14\\y=14[/tex]
9.
Sprinter:
100 yards = 10 seconds
divide by 10 on both sides
10 yards = 1 second
Long-distance runner:
1 mile = 1760 yards
4 minutes = 240 seconds
1760 yards = 240 seconds
divide by 240 on both sides
1 yard = 7 1/3 seconds
Comparing:
[tex]7\frac{1}{3} -1=6\frac{1}{3}[/tex]
6 1/3 yards per second faster
