Answer:
21 yards
Step-by-step explanation:
3 yards for 1 mum
3*7 yards for 7 mums
21 yards for 7 mums
I don't know if this is what you mean but here have this
Answer:
B
Step-by-step explanation:
Recall that 
So now

The answer is B because they never pass through each other therefore it has infinite possibilities
Answer:
24-(L times 2) then divide the awnser by 2
Step-by-step explanation:
320 has the same value as 32 tens