1. If 3x + 4y =0 and x= 2y -5 , find the value of (X,y). 2. The sine of an angle is the ratio of the opposite to the? 3. Calcula
te the volume of a cylindrical steel bar which is 8cm long and 1.75cm in radius. (Take ) pi 22/7 Please help.
       
      
                
     
    
    
    
    
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Answer:
1.
 3x + 4y = 0
 x - 2y = 5
Solving them simultaneously we get
x = 2 and y = -1.5
Value of (x , y ) is ( 2 , -1.5)
2. Sine of an angle is the ratio of the opposite to the Hypotenuse
3.
Volume of a cylinder = πr²h
r = radius h = height
V = 22/7 × 1.75² × 8
V = 22/7× 24.5
V = 77cm³
Volume of the cylinder is 77cm³
Hope this helps.
 
                                
             
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