a+4<9
What do we call the distance travelled in one complete turn of a wheel?
I guess, the circumference of the wheel
https://www.google.com/search?q=formula+for+circumference&oq=formula+for+circumference&aqs=chrome..69i57j69i60.4912j0j9&sourceid=chrome&ie=UTF-8
To solve the inequality a + 4 < 9, you need to isolate the variable "a" on one side of the inequality sign.
Step 1: Subtract 4 from both sides:
a + 4 - 4 < 9 - 4
a < 5
Therefore, the solution to the inequality a + 4 < 9 is a < 5.