Answer:

Step-by-step explanation:
The model shows that there are 40 tiles which were divided into 4 per group. This results into 10 groups. That is:

Therefore, the expression modeled by the arrangement of the tiles is 
I am not sure, but the best answer should be 8 miles per hour
Answer:
Step-by-step explanation:
-2x-14+10x=34
8x-14=34
8x=48
x=6