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:
B.
Step-by-step explanation:
Answer:
HIRF- IN 1 QT -4FT
Step-by-step explanation:
The answer is 16, just put the numbers in
making(1+3) to the power 2
4 to the power 2
is 16
Answer:
The percentage decrease is 29%
Step-by-step explanation:
Given
Required
Determine the percentage decrease
This is calculated as thus:
Substitute values for Final and Initial
<em>Get absolute value of -87</em>
Hence, the percentage decrease is 29%