Answer:
30
Step-by-step explanation:
5ab-2c
5(2)(3)-2(0)
5(6)-2(0)
30-0
30
 
        
             
        
        
        
Answered respectively;
1) 0.13514
2) 0.125
        
                    
             
        
        
        
Answer:
28
Step-by-step explanation:
1) subtract 12 from both sides
2) divide by negative 1
 
        
                    
             
        
        
        
<span> f(x)=4x^8+7x^7+1x^6+
</span>∴<span> f(-2)=4(-2)^8+7(-2)^7+1(-2)^6+1
</span>∴ <span>f(-2)=(4x256) + (7x-128) + (1x64) +1
</span>∴ <span>f(-2)=1024 - 896 + 64 +1
</span>∴ <span>f(-2)= 193</span>
        
             
        
        
        
It looks like the parabola are going down, so  the coefficient should be negative,
B or C,
then we see that the parabola has x -intercepts (1,0) and (5,0)
these roots should be written as multiples 
x=1, so x-1=0
and 
x=5, so x-5=0,
so (x-1)(x-5) and negative first coefficient -2 at the same time. 
We can see only in the 
B. <span>f(x) = –2(x – 5)(x – 1)</span>