X+y+z=22
(x+y+z+t)/4=8
subsitute
x+y+z=22
(22+t)/4=8
multiplly by 4
22+t=32
subtract 22
t=10 
the fourth number is 10
        
             
        
        
        
Answer:
Your answer would be the first option.
A right angle is 90 degrees
An obtuse angle is more than 90 degrees and that angle is more that 90 degrees 
 
        
             
        
        
        
Answer:
y=3/2x+2
Step-by-step explanation:
Slope is 3/2, y intercept is 2
 
        
                    
             
        
        
        
Answer:

Step-by-step explanation:
 
        
                    
             
        
        
        
This can be solved by Newton's binomial formula
Tk+1 = (n k) a∧(n-k) b∧k  k+1=7 => k=6, n=11 , a=-3x and b=-2y
T7= (11 6) (-3x)∧(11-6) (-2y)∧6 = (11*10*9*8*7)/(1*2*3*4*5) (-3x)∧5 (-2y)∧6
T7= 462 (-3x)∧5 (-2y)∧6
The correct answer is A.
Good luck!!!