-1 1, -2 2, 3 -3. Is this what you wanted? If no tell me in comments and maybe a can help fix.
In maths, f (x) means as a special relationship where every single input has one output.
<u>Step-by-step explanation:</u>
In mathematics, a function is any expression that gives exactly one answer for each particular number. Input is the number provided in the expression, and output is the number obtained from the search or calculation.
In an ordered pair, input’s first number corresponds to the horizontal axis, and output’s second number in the vertical axis. These ordered pairs can then be plotted. Some data on the costs associated with this are called relationships. For example,

It is often written as "f (x)" where x is the input value and
is the output value.
Just divide 18 by 20 , so its 0.9
Answer:

Step-by-step explanation:
By lowest terms, it means to simplify. You can do so by dividing the fraction by a common factor, which in this case, is 6:
÷
=

The fraction
cannot be simplified further, so this is the final answer.
Answer:
28cm
Step-by-step explanation:
7x4
or
7+7+7+7