Answer:
The following are the solution to the given points:
Step-by-step explanation:
for point A:

                                         
The set A is not part of the subspace 
for point B:

                                              
 
The set B is part of the subspace  
for point C:

In this, the scalar multiplication can't behold

 ∉ C
 ∉ C
this inequality is not hold
The set C is not a part of the subspace  
for point D:

The scalar multiplication s is not to hold
 ∉ D
 ∉ D
this is an inequality, which is not hold
The set D is not part of the subspace 
For point E:

The   is the arbitrary, in which
 is the arbitrary, in which  is arbitrary
is arbitrary  

The set E is the part of the subspace  
For point F:

The  arbitrary so, they have
 arbitrary so, they have  as the arbitrary
 as the arbitrary 
The set F is the subspace of 
 
        
             
        
        
        
Answer:
Step-by-step explanation:
I believe it’s false 
 
        
             
        
        
        
No its a negitive number one x minus five x's equal -14
        
             
        
        
        
cos(30)=x/8
Rewrite the equation as 
x/8=cos(30)
Multiply both sides of the equation by 
8
.
8
⋅
x/8=8⋅cos(30)
Simplify both sides of the equation.
Tap for more steps...
x=4√3
The result can be shown in multiple forms.
Exact Form:
x=4√3
Decimal Form:
x=6.9282032