Answer:
Mr.Lin's present age is 30 years now. His son is 8 years old now.
Step-by-step explanation:
Let L = Mr.Lin's present age,
S = his son's present age.
First equation is
L + S = 38. (1)
The second equation is
L + 3 = 3*(S+3) (2) ("In three years' time, Mr.Lin will be three times as old as his son.")
From (1), express S = 38-L and substitute it into (2). You will get
L + 3 = 3*((38-L)+3), or
L + 3 = 114 - 3L + 9,
4L = 114 + 9 - 3,
4L = 120,
L = 30.
Answer: A. 40
Step-by-step explanation:
Answer:
I have to say it's either D or A. I'm not really good with math though, good luck!
Answer:
yes she will
Step-by-step explanation:
im not very sure if it is correct, and if its wrong then im sorry
Answer:
8 cm
Step-by-step explanation:
divide 400 by 50 which is 8.
