Answer:
C.  f(-1) =12
Step-by-step explanation:
 f(x)= 3x^2+9
Let x=-1
f(-1) = 3(-1)^2 +9
       = 3(1)+9
       = 3+9
       = 12
f(-1) =12
 
        
                    
             
        
        
        
Answer
777
Step-by-step explanation:
jnimimimimimim000
 
        
                    
             
        
        
        
Answer:
x = -4
Step-by-step explanation:
 -24 = 6x 
________
Switch sides:
6x = -24
________
Divide both sides by 6: 
6x/6 = -24/6
________
Simplify:
X = -4
 
        
             
        
        
        
This questions can be answered with a calculator, but I have an impression it is meant to be a mental calculation problem, which can be solved as follows.
We know that 10*10=100, in otherwords, √ 100 = 10 which is greater than 9.4247.
We also know that √ 108  is greater than √ 100 =10
So we can conclude that
√ 108 > √ 100 = 10  > 9.4247
or simply
√ 108 > 9.4247
by the transitive property of logical propositions.
        
             
        
        
        
We have that
 case 1)<span>system of equations is
</span><span>y=−12x−1
y=14x−4
using a graph tool
see the attached figure
the solution of the system  is the point (0.115,-2.385)case 2)
</span>system of equations is
<span>blue line passing through coordinates A (0, -4) and B (4, -3)
</span><span>red line passing through coordinates   C(0, -1) and  D (4, -3)
</span>using a graph tool
see the attached figure
the solution of the system  is the point (4,-3)<span>
</span>