40 is the answer =3 hope it works
Answer:
26 is the perimeter
Step-by-step explanation:
you add all of the side numbers just like this:
9+5+12= 26 :)
Hope this helped :D
Answer: second option.
Step-by-step explanation:
You must apply 
Then, given the right triangle and the angle D, the opposite side and the hypotenuse of the triangle are the following:

Therefore, when you substitute values, you have:

Reduce the fraction, then you obtain:

Answer:
y = x-4
Step-by-step explanation:
you can put it in a calculator to be sure