Answer:
z = 6
Step-by-step explanation:

(x,y,z)=(-4,-2,-5)
I added some images for explanation
If you are imposing the x=-9 then, the problem would be set up like this:
=-9-3(-9)+5
=-9-(-27)+5
=18+5
=23
Answer:
the appropriate choice is the last one
Step-by-step explanation:
![7^{\frac{4}{5}}=(7^4)^{\frac{1}{5}}=\sqrt[5]{7^4}](https://tex.z-dn.net/?f=7%5E%7B%5Cfrac%7B4%7D%7B5%7D%7D%3D%287%5E4%29%5E%7B%5Cfrac%7B1%7D%7B5%7D%7D%3D%5Csqrt%5B5%5D%7B7%5E4%7D)
This is equivalent to b^(pq) with b=7, p=4, q=1/5. Here, q is a rational number, as suggested by the last answer choice.
Answer:
1.891
X
Step-by-step explanation: