The answer would be the third one because you cannot change the denominator and you can only add the numerators
Answer:
Step-by-step explanation:
This is werid... Don't know how to answer this sorry.
Always add them all around and then divide the two and you should get the correct answer
She can expect 70 to be ads since there is 10 times more emails so 7 times 10 is 70 so 70 ads
