Answer:
you cant answer it without a calculator 
Step-by-step explanation:
press shift - then cos then whatever u need to do to get a 
 
        
             
        
        
        
Answer:
ewfd
Step-by-step explanation:
ewxd
 
        
             
        
        
        
Answer:
Degree is 6
Step-by-step explanation:
Solving given polynomial gives -3x^3y^3-2.5xz^2
as this polynomial involves two variables so we'll add the powers on variables in each term 
first term: -3x^3y^3, add powers on x and y variables which turns out to be 6
Second term: 2.5xz^2, adding powers on x and z variable results in 3
As degree is the highest power among different powers on terms so here the degree is 6 
 
        
             
        
        
        
Answer:
142 sq cm
Step-by-step explanation:
You find the areas of each face, using area of a rectangle (length * width), to get: 7*3+7*3+7*5+7*5+3*5+3*5=21+21+35+35+15+15=<u>142</u>