The answer is b ...........................................................b............b..............
        
                    
             
        
        
        
Answer: k = -1 +/- √769
<u>Step-by-step explanation:</u>
 48x - ky = 11
<u>-48x        </u>  <u> -48x</u>
          -ky = -48x + 11
           
    
             
 
Slope:  
 
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  (k + 2)x + 16y = -19
<u>- (k + 2)x          </u>   -<u>(k + 2)x </u>
                  16y = -(k + 2)x - 19
                   
                   
Slope: 
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  and
 and  are perpendicular so they have opposite signs and are reciprocals of each other.  When multiplied by its reciprocal, their product equals -1.
 are perpendicular so they have opposite signs and are reciprocals of each other.  When multiplied by its reciprocal, their product equals -1.
 *
 *   = -1
 = -1
 = 1
 = 1
Cross multiply, then solve for the variable.
(k + 2)(k) = 16(48)
k² + 2k - 768 = 0
Use quadratic formula to solve:
k = -1 +/- √769
 
        
             
        
        
        
Where he started (495) minus 6 feet per second (-6t) till he gets to the ground (=h)
Put them together: 495-6t=H :) 
Hope that helps
        
                    
             
        
        
        
1) false
2)true
3)-1.346 
<span>4)<span><span>x=−5</span><span>x=-5</span></span></span>
<span>5)<span>x=3</span></span>
<span>6)x =~ 3.91 </span>
<span>7) x = 162.69 </span>
<span>hope I helped :)</span>
7)