Answer:
The sum of the age of pupils is 81
Step-by-step explanation:
Let sum of age of 18pupils = x
Average ages = 4.5
Average = total/no. of pupil
4.5 = x/18
x = 81
Answer:
They have different slopes and different y-intercepts, so they have no solution
Step-by-step explanation:
Answer:
2
Step-by-step explanation:
63 = 10 + m
hope this helps :)