Answer:
y = -3/4 + 9
Step-by-step explanation:
y=mx+b
3 = -3/4(8) + b
3 = -6 + b
9 = b
y = -3/4 + 9
 
        
             
        
        
        
Answer:
30 = 2 x 3 x 5
Step-by-step explanation:
The secret number is the least whole number that has three different prime factors. Since, this is the least whole number it should have the 3 smallest prime numbers as its factors.
The 3 smallest prime numbers are: 2, 3 and 5
The number that will have 2, 3 and 5 as its only factors will be the least whole number with 3 different prime factors. 
So, the secret number  must be = 2 x 3 x 5 = 30
 
        
             
        
        
        
#1. x =    - (2y) / (1-y)
#2. x =    (-4y-3)/(1-y)
I can't really see the other questions, so I only did the first two. Hope this helps!