Answer:
The sum of ages of all 18 pupils in the class = 81
Step-by-step explanation:
Total number of pupil in the class = 18
Average of years in the class = 
Now, 
⇒Average of sum of ages in the class = 4.05
Let us assume the sum of ages of all students in the class = m
By the formula for AVERAGE:
or, m = 18 x 4.5 = 81
Hence, the sum of ages of all 18 pupils in the class = 81
Answer:
Step-by-step explanation:
3x² -2 =3*(-3)²-2=3*9 - 2
= 27 - 2
= 25
Hope this helps, let me know if it doesn't make sense
5 that's the answer, so why do you need an explanation?
Answer:
Answer is
(100*-m)+(45*n)
Step-by-step explanation: because stock decreases per sock so you're going to multiply 100 times -m because it is decreasing so it will be negative
Then it will be 45*n because it increases per number of stocks so you multiply 45 which is the number of stocks times n
Step-by-step explanation:
