Answer:
a
Step-by-step explanation:
Using Pythagoras' identity on the right triangle
let x be the other leg to be found, then
155² = 124² + x² 
24025 = 15376 + x² ( subtract 15376 from both sides )
8649 = x² ( take the square root of both sides )
 = x
 = x
Hence x = 93 cm ← length of other leg → a
 
        
             
        
        
            
            
                (8x 2 −15x)−(x 2 −27x)=ax 2 +bxleft parenthesis, 8, x, squared, minus, 15, x, right parenthesis, minus, left parenthesis, x, squ 
                quester [9]             
         
        
Answer:
<h2>5</h2>
Step-by-step explanation:
Given the expression (8x² −15x)−(x² −27x) = ax² +bx, we are to determine the value of b-a. Before we determine the vwlue of b-a, we need to first calculate for the value of a and b from the given expression.
On expanding the left hand side of the expression we have;
 = (8x² −15x)−(x² −27x)
Open the paranthesis
 = 8x² −15x−x²+27x
collect the like terms
= 8x²−x²+27x −15x
=  7x²+12x
Comparing the resulting expression with ax²+bx
 7x²+12x =  ax²+bx
7x² = ax²
a = 7
Also;
12x = bx
b =12
The value of b - a = 12 - 7
b -a = 5
Hence the value of b-a is equivalent to 5
 
        
             
        
        
        
Answer:
20%
Step-by-step explanation:
becuz 2×.2 = .4 
subtract .4 from 2 and it's 1.6 and change the .2 to percentage
 
        
             
        
        
        
Answer:
-42
Step-by-step explanation:
f(8)=6(1-8)
because of that 1-8 is -7 so you times by 6 and get -42