A letter or symbol is used to represent an unknown quantity
        
                    
             
        
        
        
It takes 6 seconds for it to hit the ground.
0 = -5x²+20x+60
We can solve this by factoring.  First factor out the GCF, -5:
0 = -5(x²-4x-12)
Now we want factors of -12 that sum to -4.  -6(2) = -12 an -6+2 = -4:
0 = -5(x-6)(x+2)
Using the zero product property, we know that either x-6=0 or x+2=0; this gives us the answers x=6 or x=-2.  Since we cannot have negative time, x=6.
        
                    
             
        
        
        
Answer:
a) <em>Z-score = 0.75</em>
b) <em>Z-score = -32.833</em>
Step-by-step explanation:
<u><em>Step(i):-</em></u>
Given that mean of the Population = 33
Given a standard deviation of the Population = 12
Let 'X' be a random variable in a normal distribution
Let 'X' = 42
<u><em>Step(ii):-</em></u>
<em>      </em> <em></em>
<em></em>
<em>     </em> <em></em>
<em></em>
<u><em>Step(iii):-</em></u>
<em>Given that mean of the Population = 89</em>
Given a standard deviation of the Population = 1
Let 'X' be a random variable in a normal distribution
Let 'X⁻ = 82
<em>   </em> <em></em>
<em></em>
<em>     </em> <em></em>
<em></em>
<em>Z-score = -32.833</em>
<em></em>
 
        
             
        
        
        
Answer:
35
Step-by-step explanation:
If is given the value -8 as it is the input then -->
y = -4(-8) + 3 
Negative four times negative 8 is positive 32 so 
y= 32 + 3 
And 32 plus 3 is 35 
 
        
                    
             
        
        
        
Answer:
y= -1= 3(x -3)
Step-by-step explanation:
y -y1= m(x -x1)
y -1= 3(x -3)