. A certain coin is a circle with diameter 18 mm. What is the exact area of either face of the coin in terms of p?

The area is given by:

And replacing we got:

So then we can conclude that the area of the coin is mm^2

Step-by-step explanation:

For this case we know that we have a coin with a diamter of , and by definition the radius is given by:

The area is given by:

And replacing we got:

So then we can conclude that the area of the coin is mm^2

x =±sqrt(1/3)

step-by-step explanation:

x+4/6x=1/x

multiply each side by 6x to get rid of the fractions

6x*(x+4/6x)=1/x*6x

distribute

6x^2 +4 = 6

subtract 4 from each side

6x^2 +4-4 = 6-4

6x^2 =2

divide by 6

6x^2/6 = 2/6

x^2 = 1/3

take the square root of each side

sqrt(x^2) = ±sqrt(1/3)

x =±sqrt(1/3)

to find the perimeter of the rectangle this is the expression:

x-9+x-9+3x-4+3x-4=138

if we simplify it:

8x-26=138

remember, 138 is what it all adds up to

the length is 11.5cm

the width is 57.5cm

the area is 661.25cm^2

the answers might not be correct use at own risk