Answer:
9p^2q-5pq^2-pq+5q^2
Step-by-step explanation:
Answer: 13
Step-by-step explanation:
Following order of operations:
16-2+3-4
14+3-4
17-4
13
Answer: The average was 9 years old find the average age of both groups is 10 years old.
Step-by-step explanation:
Formula foe average : 
Given : The first group of students consists of 10 and their average age was 13 years old.
i.e.
(1)
The next group consisted of 30 students and their average was 9 years old.
i.e.
(2)
Then from (1) and (2) , the sum of both groups (first group and next group )students = 130+270 =400
Combined students of both groups (first and next group )= 10+30=40
Now , the average of both groups =

Hence, the average was 9 years old find the average age of both groups is 10 years old.
Answer:
If an object on Mercury weighed 25lb, it would weigh 75lb on Earth
(25 * 3 = 75)
The answer is b
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