Answer:
Option A. <A and <B are complementary angles
Option D. 
Step-by-step explanation:
we know that
If ABC is a right triangle
then
 ------> by complementary angles
 ------> by complementary angles
and


Remember that

so


 
        
             
        
        
        
Answer: b
Step-by-step explanation:
 
        
                    
             
        
        
        
3.75 meters I would presume. 
Explanation: since a single meter casts a shadow of 0.75 meters that means for each meter, 0.25 meters are missing. So I added 0.75 to three, because there was 3 meters and 3 time 0.25 was 0.75 .
        
             
        
        
        
The slope of the above is -2
        
             
        
        
        
Answer:
9 weeks.
Step-by-step explanation:
First, find how many dollars Navid needs to save. 
288-72= 216
Then, divide how much money that is needed by the number of dollars that are saved per week. 
216/24= 9
Then tie it up into an equation: 
(288-72)/24= x
x=9