I can’t understand what you are asking for
What do you mean " Inst it the definition?
39 foot into 3 pieces
one is 13 feet
the other pieces add up to the
remaining wire
which is 39-13=26 so
the two remaining pieces are x and y
one must be 2 less than 3 times the
other
x must be 2 less than 3 times the y
x=-2+3y
x=3y-2
x+y=remaining=26
26=x+y
x=3y-2
subsitute
26=3y-3+y
add like terms
26=4y-2
add 2 to both sides
28=4y
divide by 4
7=y
subsitute
7+x=26
subtract 7
x=19
19>7
7 feet is the legnth of the shorter
piece
Assuming that the pool is a perfect rectangular prism, then its volume, V, is given by

, where l is the length, w is the width, and h is the height. Manipulate this formula first to solve for length.

Divide both sides of the equation by w*h.

Now, plug in your values for volume, width, and height.
The answer is 120 ft.
Answer: Either

or

depending on your teacher's preference. See the note at the bottom for more info.
=====================================
Let x be the speed limit. It is simply a placeholder. Think of it as a box with the number inside. We don't know what the number is, but we know that the largest it can be is 55. It cannot be larger than 55.
So x can be equal to 55 or it can be smaller
Put another way, x is less than or equal to 55 which is written as

(on the keyboard you would type " x <= 55 " without quotes).
---------------------------------------
Note: since negative speeds make no sense, we also must imply that x can't be negative. Your teacher may want you to write this in to clearly state it. If so, then you would also have

which when combined with the first inequality, you get this compound inequality

(basically saying "x is some speed between 0 and 55 mph"). This very clearly states the boundaries on what x can be. Though your teacher may want you to stick to the first format as its simpler.