The same way you solve any other math problem:
You use the information you're given, and all the formulas, equations, and rules
that you know that might connect what you're given to what you need to find, and
then choose the best one to find the missing answer from the given information.
The function h is defined by h(x)=x^2 +2.
Find h(3y).
The answer is 2+9 _
Answer:
Step-by-step explanation:
Required

Construct a rectangle whose perimeter is 42 units and satisfies the given conditions.
First, name the rectangle ABCD.
Such that:




For the rectangle to be either horizontal or vertical, then:
and 
We have that:

Replace perimeter with its formula

Divide both sides by 2

This implies that, the distance between adjacent sides (through the edges) must be equal to 21
Having said that: a set of coordinates that satisfy the given conditions are:
-- First quadrant
-- Second quadrant
-- Third quadrant
-- Fourth quadrant
The above quadrants satisfy the condition:
and 
<u>HOW TO KNOW THE PERIMETER IS 42</u>
To do this, we simply calculate the distance between the edges and add them up
<u>Distance is calculated as:</u>
<u></u>
<u></u>
<u></u>
<u>For AB</u>

<u>For BC</u>

<u>For CD</u>

<u>For DA</u>

So, the perimeter is:



See attachment for rectangle