Answer: Your bones
Step-by-step explanation: Since your "skeletal system" here is your bones, it helps you walking and running. They move back and fourth along with muscles to help you walk.
Answer:
17?15
Step-by-step explanation:
this has bean simplifyed dow to
= -1/6
x= 9
y= 4
The blue triangle is double the size of green so
2+2=4
18/2=9