Paolo was asked to find the original dimension of an enlarged pentagon. his solution is shown next to the pentagons.

Second option is correct.

Step-by-step explanation:

Since we have given that

Let the original dimension of pentagon be x

So, we have ratio as follow:

so, Paolo was asked to find the original of an enlarge pentagon.

And she did,

so, she made an error when he cross multiplied the proportion.

That's why she got wrong answer.

Hence, Second option is correct.

a4 - 3a2 - 1

step-by-step explanation:

step   1   :

equation at the end of step   1   :

  ((a4) -   3a2) -   1

step   2   :

trying to factor by splitting the middle term

2.1     factoring   a4-3a2-1  

the first term is,   a4   its coefficient is   1 .

the middle term is,   -3a2   its coefficient is   -3 .

the last term, "the constant", is   -1  

yes because there is exactly one y value for every x value

for function there can't be more than one value for every x value