The perimeter o f a rectangle is 70 in., and the width is 9 in.
what is the length?

26 inches

Step-by-step explanation:

First, subtract 18 by 70, since there will be 2 width amounts in the perimeter:

70 - 18

= 52

Then, divide this by 2, to find the length:

52/2

= 26

So, the length is 26 inches.

Insert a number into the x,

the middle column, you just substitute,

and the last column, you enter what x and y is.

Step-by-step explanation:

For example,

if x was 5, I would write 5 under the column,

under the y=2x+5 column, you would write y=2*5+5,

and under the last column you would write (5, 15)