Answer:
first one is square root
 don't know the second tho 
 
        
             
        
        
        
It’s (-8z^2 +8x +4y -2z)
Hope it helps
        
             
        
        
        
Given:
Rachel used  of her savings to buy brushes.
 of her savings to buy brushes.
She used  of her savings to buy paint.
 of her savings to buy paint.
To find:
The fraction for remaining savings.
Solution:
Fraction that Rachel used of her savings to buy brushes and paint is

                                     
                                     
Now,



Therefore,  of her savings is remaining.
 of her savings is remaining.
 
        
             
        
        
        
So really all you have to do is simply the expressions on top to match them.
Starting with (4t-8/5)-(3-4/3t), distribute the negative sign to the right portion in parentheses, then distribute it all out and you will get 16/3t- 23/5
Basically, use distribution to simplify, here's all the matches:
(4t-8/5)-(3-4/3t) --> 16/3t- 23/5
5(2t+1)+(-7t+28) --> 3t+33
(-9/2t+3)+(7/4t+33) --> -11/4t+36
3(3t-4)-(2t+10) --> 7t-22