Answer:
see explanation
Step-by-step explanation:
since y is inversely proportional to x the equation relating them is
y = 
← k is the constant of proportionality
to find k use the given condition when y = 7, x = 9
k = yx = 7 × 9 = 63
y = 
← is the equation connecting them
when x = 21, then
y = 
= 3
Either:
y-8=2(x+3)
y-8=2x+6
-2x+y=14
or
y-8=2(x+3)
y=2x+14
Length of a circumference=2πr
r=radius=6 feet.
lengt of this circumference=2π6 feet=12π feet.
1 circumference=360º; then:
360º-------------------12π feet
6º---------------------- x
360º * x=6º * 12π feet
x=(6º * 12π feet) / 360º=π/30 feet (≈0,105 feet).
Solution: π/30 feet
Area of a rectangle is L * W
L = x
W = 5
5x = 20 (Divide by 5 on both sides)
x = 4
L=4
W= 5
The length is 4cm
Hope this helps :)
