Answer:
D) L = 315 cm2 ; S = 399.9 cm2
Step-by-step explanation:
Lateral area;
3 × (½)(14)(15) 
315 cm²
Surface area:
315 + (½)(14)(14)sin(60)
399.8704896 cm²
 
        
                    
             
        
        
        
I don’t think their is a solution to this equation 
because if you expand the second half it is= 24y-24 which would make the equation
- 24y-22=24y-24 
and because the number next to the y is the same on both sides, no matter what y is if we subtract different numbers from each side we will never get the same value for each side of the =
        
             
        
        
        
Answer:
54 years 
Step-by-step explanation:
Joyce age = x
Alex age = y
3x = 2y - - - (1)
y - 9 = 2(x - 9)
y - 9 = 2x - 18
-9 + 18 = 2x - y
9 = 2x - y
y = 2x - 9 - - (2)
3x = 2y
3x = 2(2x - 9)
3x = 4x - 18
18 = 4x - 3x
18 = x
Hence, 
Mrs stone is 3 * 18 = 54 years 
 
        
             
        
        
        
Answer:
HCF=3
Step-by-step explanation:
Factors of 15t= 3*5*t
Factors of 6s= 2*3*s
HCF= Common factors
common factor = 3
HCF=3
 
        
             
        
        
        
The slope is 2 and the y intercept is 3 m = 3 and b = 2x