Sos i literally have no idea how to do 9-! if anyone knows how plz . u so much❤️❤️❤️

So before we jump into these problems, we must keep this particular rule in mind:

So remember that the perimeter is the sum of all the sides. In this case:

So firstly, using the product rule of radicals we need to simplify these radicals as such:

Now, combine like terms (since they all have the same like term √3, they can all be added up):

Your final answer is 17√3 in.

For this, we will be using the pythagorean theorem, which is , where a and b are the legs of the right triangle and c is the hypotenuse of the triangle. In this case, √18 and √32 are our legs and we need to find the hypotenuse. Set up our equation as such:

From here we can solve for the hypotenuse. Firstly, solve the exponents (remember that square roots and squared power cancel each other out):

Next, add up the left side:

Lastly, square root both sides of the equation:

The hypotenuse is √50 cm.

Now, the process is similar to that of 9 so I will just show the steps to the final answer.

The perimeter is 12√2 in.

Now, the process is still similar to question 9 but remember that this time we are working with cube roots.

Note that when adding the numbers together, 3 isn't a like term to the other 2 terms because it doesn't have ∛3 multiplied with it.

The perimeter is 3 + 12∛3 in.

i believe it's a.

i'm not sure on this one, most likely correct.