To solve this problem we can make proportions.

We know that $\displaystyle 1\ foot=12\ inches$, and we can use $\displaystyle x$ has our unknown. 

$\displaystyle \frac{1\ foot}{12\ inches}=\frac{x\ feet}{72\ inches}$

Next, we want to cross multiply and divide to isolate the $\displaystyle x$ on one side. 

$\displaystyle 12\ inches\times x\ feet= 1\ foot \times 72\ inches$

$\displaystyle 6\ feet= \frac{1\ foot \times 72\ inches}{12\ inches}$

The $\displaystyle \yards$$\displaystyle \ inches$ will cancel and we are left with $\displaystyle 6\ feet$

To solve this problem we can make proportions.

We know that $\displaystyle 1\ centimeter= .01\ meters$ and we can use $\displaystyle x$ as our unknown. 

$\displaystyle \frac{1\ centimeter}{.01\ meter}=\frac{6\ centimeters}{x\ meters}$

Next, we want to cross multiply and divide to isolate the  on one side. 

$\displaystyle 1\ centimeter\times x\ meters=.01\ meter\times 6\ centimeters$

$\displaystyle x\ meters=\frac{.01\ meter\times 6\ centimeters}{1\ centimeter}$

The $\displaystyle centimeters$ will cancel and we are left with $\displaystyle .06\ meters$

To solve this problem we can make proportions.

We know that $\displaystyle 1\ centimeter= .01\ meters$ and we can use $\displaystyle x$ as our unknown. 

$\displaystyle \frac{1\ centimeter}{.01\ meter}=\frac{x\ centimeters}{3\ meters}$

Next, we want to cross multiply and divide to isolate the  on one side. 

$\displaystyle 1\ centimeter\times 3\ meters=.01\ meter\times x\ centimeters$

$\displaystyle \frac{1\ centimeter\times 3\ meters}{.01\ meter}= x\ centimeters$

The $\displaystyle meters$ will cancel and we are left with $\displaystyle 300\ centimeters$

To solve this problem we can make proportions.

We know that $\displaystyle 1\ centimeter= .01\ meters$ and we can use $\displaystyle x$ as our unknown. 

$\displaystyle \frac{1\ centimeter}{.01\ meter}=\frac{x\ centimeters}{7\ meters}$

Next, we want to cross multiply and divide to isolate the  on one side. 

$\displaystyle 1\ centimeter\times 7\ meters=.01\ meter\times x\ centimeters$

$\displaystyle \frac{1\ centimeter\times 7\ meters}{.01\ meter}= x\ centimeters$

The $\displaystyle meters$ will cancel and we are left with $\displaystyle 700\ centimeters$

To solve this problem we can make proportions.

We know that $\displaystyle 1\ centimeter= .01\ meters$ and we can use $\displaystyle x$ as our unknown. 

$\displaystyle \frac{1\ centimeter}{.01\ meter}=\frac{x\ centimeters}{9\ meters}$

Next, we want to cross multiply and divide to isolate the  on one side. 

$\displaystyle 1\ centimeter\times 9\ meters=.01\ meter\times x\ centimeters$

$\displaystyle \frac{1\ centimeter\times 9\ meters}{.01\ meter}= x\ centimeters$

The $\displaystyle meters$ will cancel and we are left with $\displaystyle 900\ centimeters$

To solve this problem we can make proportions.

We know that $\displaystyle 1\ centimeter= .01\ meters$ and we can use $\displaystyle x$ as our unknown. 

$\displaystyle \frac{1\ centimeter}{.01\ meter}=\frac{x\ centimeters}{17\ meters}$

Next, we want to cross multiply and divide to isolate the  on one side. 

$\displaystyle 1\ centimeter\times 17\ meters=.01\ meter\times x\ centimeters$

$\displaystyle \frac{1\ centimeter\times 17\ meters}{.01\ meter}= x\ centimeters$

The $\displaystyle meters$ will cancel and we are left with $\displaystyle 1,700\ centimeters$

To solve this problem we can make proportions.

We know that $\displaystyle 1\ yard=36\ inches$, and we can use $\displaystyle x$ as our unknown. 

$\displaystyle \frac{1\ yard}{36\ inches}=\frac{6\ yards}{x\ inches}$

Next, we want to cross multiply and divide to isolate the $\displaystyle x$ on one side. 

$\displaystyle 36\ inches\times 6\ yards= 1\ yard \times x\ inches$

$\displaystyle \frac{36\ inches\times 6\ yards}{1\ yard}= 216\ inches$

The $\displaystyle \yards$$\displaystyle \ yards$ will cancel and we are left with $\displaystyle 216\ inches$

To solve this problem we can make proportions.

We know that $\displaystyle 1\ yard=36\ inches$, and we can use $\displaystyle x$ as our unknown. 

$\displaystyle \frac{1\ yard}{36\ inches}=\frac{3\ yards}{x\ inches}$

Next, we want to cross multiply and divide to isolate the $\displaystyle x$ on one side. 

$\displaystyle 36\ inches\times 3\ yards= 1\ yard \times x\ inches$

$\displaystyle \frac{36\ inches\times 3\ yards}{1\ yard}= 108\ inches$

The $\displaystyle \yards$$\displaystyle \ yards$ will cancel and we are left with $\displaystyle 108\ inches$

To solve this problem we can make proportions.

We know that $\displaystyle 1\ yard=36\ inches$, and we can use $\displaystyle x$ as our unknown. 

$\displaystyle \frac{1\ yard}{36\ inches}=\frac{x\ yards}{396\ inches}$

Next, we want to cross multiply and divide to isolate the $\displaystyle x$ on one side. 

$\displaystyle 36\ inches\times x\ yards= 1\ yard \times 396\ inches$

$\displaystyle 11\ yards= \frac{1\ yard \times 396\ inches}{36\ inches}$

The $\displaystyle \yards$$\displaystyle \ inches$ will cancel and we are left with $\displaystyle 11\ yards$

To solve this problem we can make proportions.

We know that $\displaystyle 1\ foot=12\ inches$, and we can use $\displaystyle x$ as our unknown. 

$\displaystyle \frac{1\ foot}{12\ inches}=\frac{20\ feet}{x\ inches}$

Next, we want to cross multiply and divide to isolate the $\displaystyle x$ on one side. 

$\displaystyle 12\ inches\times 20\ feet= 1\ foot \times x\ inches$

$\displaystyle \frac{12\ inches\times 20\ feet}{1\ foot}= 240\ inches$

The $\displaystyle \yards$$\displaystyle \ feet$ will cancel and we are left with $\displaystyle 240\ inches$