Although you didn't provide any answer choices:
A trinomial is an expression with exactly three terms that can't be combined an example would be this
x^2 - 3x + 1
None of those terms can be combined
x^2 + 3 - 4 has three terms but it isn't considered a trinomial because you can simplify it to x^2 - 1 which is known as a binomial because it has 2 terms in it's simplified form.
hope this helps C:
No.
Tom forgot about the area of the top/roof, the floor and roof are different dimensions/areas, making his method incomplete.
He needs to find area of Roof, Floor then times height.
Answer:
<h3>

</h3>
Step-by-step explanation:
Let's solve:
As we know that the sum of angles of traingle adds to 180°

Collect like terms
⇒
⇒
⇒
Move constant to right hand side and change it's sign
⇒
Calculate the difference
⇒
Divide both sides of the equation by 6
⇒
Calculate
⇒
Now, let's replace the value:
⇒
⇒
⇒
Hope I helped!
Best regards!!
The answer is y2*2
hope this helps