(1) 9*4 - 4c = x
(2) 9*2 +2c = x
∴ 36 - 4c = 18 + 2c
18 - 4c = 2c
9 - 2c = c
9 = 3c
c = 3 mph
Answer:
How about these?
... a challenging terrain
... logistical problems
... navigational challenges
Explanation:
If those are the options, then your best bet for this question is
'yet'.
The other words would definitely not work in this sentence :)
Excatly what do you need help with hunny