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.
Answer:
mass
Step-by-step explanation:
I think mass is the litre unit
which fractions are you referring to
Answer:
all sides same length and 4 right angles and 4 sides
Step-by-step explanation:
The formula to solve for the area of a cube is
A=6a^2
you plug your edge in for the a
A=6(2)^2
A=6(4)
A=24 inches
your surface are would be 24 inches
