Howdy lol it’s 11:44pm over here where I’m at.
I’m sorry I don’t have the answer but Glenda and Penny really need to figure out there problems
That's 5 lengths for a three sided shape... Are you sure that is the instructions?
Answer:
(7+Z)²
Step-by-step explanation:
A less ambiguous way to describe the quantity might be "the square of the quantity seven plus Z".
As it is, we rely on the presence of the comma to tell us that the quantity to be squared is (7+Z). If the comma were not present, we would assume you want to add 7 to the square of Z: 7+Z².
the quantity 7 plus Z: (7+Z)
that quantity squared: (7+Z)²
Well, "minus 6 x cubed minus y squared minus 3 x y" translates to:

Then, if we insert the values for x and y, we get:

When we distribute and multiply:

And once we combine like terms:
104<em> is the answer</em>