Answer:
A
Step-by-step explanation:
If angle a is less then 90 then it’s acute
 
        
             
        
        
        
What we want to draw is the half closed interval:
                                          I=   [-5, 4) excluding 0,
as the union of 2 different intervals say a and b.
Let a be the interval containing the smallest value.
Then the smallest value of a is -5, and the largest possible value of a is 0, not included, if we want to write a as an interval, without "gaps", or "holes".
So a=[-5, 0)
similarly, b=(0, 4).
Answer: [-5, 4)=[-5, 0)∪(0, 4)
        
             
        
        
        
Answer:
y  + 4x - 6 = 0
Step-by-step explanation:
Rearranging the given equation:-
4y = x + 24
y = 1/4 x + 6   
This has a y intercept of  (0, 6) and a slope of 1/4.
Thus, the other line has a slope of -4 and  passes through the point (0,6) also.
Using the Point-slope form of a straight line:-
y - y1 = m(x - x1)
y - 6 = -4(x - 0)
y  + 4x - 6 = 0  is the required equation  
 
        
             
        
        
        
Answer:
A= ( 5 x 3 ) x [(9-5)x3 divided by 2]
15+6
=21
P= 5+5+3+9
=22