Answer: 1) is 20
2) is 75 minutes
3) is estimated 63
Step-by-step explanation:
1) 200×90=18000÷100=180 and 200-180=20
2) 45÷12=3.75 which is the unit rate of minutes per question and 3.75×20=75 minutes
3) to long to explain and I don't know number 4
Answer:
80 questions.
Step-by-step explanation:
-Let X be the number of problems solved on day 1.
-Questions solved on day 2 are:
We know that the total number of questions solved is 144:
Hence, the number of questions solved on the first day is 80
It should be A. 46 because 46-16=30 which means 3•10+16=46. So it is A