Answer:

Step-by-step explanation:
So we have the expression:

Combine like terms:

Add:

And we're done!
Answer:
15ft
Step-by-step explanation:
If you redraw it and use a ruler it will be 15 feet.
We observe that 14 is 4 more than twice 5.
The scooter's rate is 14 mph.
The bicycle's rate is 5 mph.
_____
time = distance/rate
14/(2b +4) = 5/b . . . . . . let b represent the bicycle's speed in mi/h
14b = 10b +20 . . . . . . . .cross multiply
4b = 20 . . . . . . . . . . . . . subtract 10b
b = 5 . . . . . . . . . . . . . . . divide by 4. Same answer as above.
Work : product of 9 and t
Answer: 9t