Answer:
a=3,b=5
Step-by-step explanation:

so as you got it:

 
        
             
        
        
        
Answer:
1.3 pounds
Step-by-step explanation:
 
        
             
        
        
        
10. from the question; the circle theorem obeyed is "angled formed by semi-circle"
The angle formed in a semicircle is 90 degrees, hence

This gives 

But

Substituting values we get

hence, x =12
 
        
             
        
        
        
2a^2b^3(4a^2+3ab^2-ab)=? 
<span>
is what I presume you actually meant. </span>
<span>
Pull out the common factors of (4a^2+3ab^2-ab) and you will get </span>
<span>
a(4a+3b^2 -b) </span>
Substitute this back into the original equation and you get 
<span>
2a^2b^3[a(4a+3b^2-b)] = </span>
2a^3b^3(4a+3b^2-b) = 
<span>2a^3b^3(4a-b+3b^2)
</span>