Answer:
the answer is A
Step-by-step explanation:
Answer:
Step-by-step explanation:
Let initial number of plants =100
Increase I year 60
Number after 1 year 160
Increase IIyear 60% 96
Number after II year 256
Increase in III year 60% 153.6
and so on
In general if t is number of years and N number of plants after n years
the expression would be
In other words, the expressions wouldbe the same as amount after t years of compound interest.
Set up a system of equations:
x + y = 9
1/x +1/y = 1/2
The easiest way to solve would be substitution.
x + y = 9 can be solved for y:
y = 9 - x
Then plug this into the second equation and solve for x:
1/x + 1/(9-x) = 1/2
(9-x) + x = x(9-x)/2
9 = (9x-x²)2
18 = 9x - x²
x² - 9x + 18 = 0
(x-6)(x-3) = 0
x = 6, 3
You can check your answer by plugging the two numbers back into both of the equations:
6 + 3 = 9
1/6 + 1/3 = 1/2
The two numbers are 6 and 3.
B) 7 would make it true, since both 42/54 and 7/9= 0.77 repeating
In plain and short, what's 2/3 of 7/8? well, is just their product.