Answer:
70 cm
Step-by-step explanation:

Answer:
Option a is the correct choice.
Step-by-step explanation:
Let n be number of hours studied by Nikki.
We are told that Cindy studied seven more hours than Nikki studied. This means that number of hours studied by Nikki plus 7 hours equals to the number of hours studied by Cindy.
We can represent this information in an expression as :

We can see from our given choices that expression given in option a represents the number of hours studied by Cindy in terms of hours studied by Nikki.
Therefore, option a is the correct choice.
Answer:
Step-by-step explanation:
You divide 38 by 439 and your answer is around 0.8656
Answer: x ≤ −23/4 or x> -2
Step-by-step explanation: