Answer:
18
Step-by-step explanation:
Hello
The number is more by three than a multiple of of 5 (i.e 5x +3) and more than 2 than a multiple of 4 (ie 4y+2(
Now 5x+3=4y+2 
ie 5x +1 =4y
we need to give the lowest pair of values to x and y such that the last equality is satisfied. 
By trial, x = 3 and y = 4 
thus the number is 5x+3 =5(3)+3 =18=4y+2 =4(4)+2=18
I hope it has helped you.
 
        
             
        
        
        
Answer:
1.5   or   3/2
Step-by-step explanation:
4x+2=8
4x=6
x=6/4
x=3/2
 
        
             
        
        
        
Answer:
Scalene is the right option.
Step-by-step explanation:
A scalene triangle has all its sides of different lengths.
 
        
             
        
        
        
Answer:
X=16
Step-by-step explanation:
Solve 3(x-9)=21   IF X = 16
16-9 = 7
3X7= 21