Answer:
x=
−b±√b2−4ac
2a
−(−6)±√(−6)2−4(2)(5)
2(2)
6±√−4
4
Step-by-step explanation:
The height of plant y =x+25
The sum of the age of pupils is 81
Let sum of age of 18pupils = x
Average ages = 4.5
Average = total/no. of pupil
4.5 = x/18
x = 81
12
18
Answer: 72
Step-by-step explanation: Because if you do 18 + 24 + 30
