Answer:
yes
Step-by-step explanation:
Yes this triangle is right angled and can be justified using the Pythagorean theorem. The theorem states that:  . Substitute using the given values:
. Substitute using the given values:
(9^2)+(12^2)=15^2
81 + 144 = 255
255 = 255.
It satisfies the theorem therefore it is a right angle triangle. 
 
        
             
        
        
        
Answer:
<h3>
<u>7. Ans ;</u></h3>

<h3>
<u>8</u><u>.</u><u> </u><u>Ans</u><u> </u><u>;</u></h3>
<u> </u>
</u>
Step-by-step explanation:
<h3>
<u>7. Ans ;</u></h3>

So ;

<h3><u>
8. Ans ;</u></h3>

So ;

I hope I helped you^_^
 
        
             
        
        
        
A. 7/3
HOPE IT HELLS U!!!!
        
             
        
        
        
1.065.   The 5 is the nearest thousandth
 
        
                    
             
        
        
        
1. For x<3, h(x)=x+2
now x+2 is an increasing line (a practical way to check, h(1)=3, h(2)=4)
the largest value it takes is at 3, not inclusive, so h(3)=5 not inclusive.
Range_1= (-∞, 5)
2. for x> or equal to 3, h(x)=-x+8, which is a decreasing line (check h(4)=4, h(5)=3 )
so this line takes its maximal value at x=3, f(3)=5 and then takes any other value to -∞.
Range_2=(-∞,5]
3. Range(h)=Range1∪Range2=(-∞, 5)∪(-∞,5]=(-∞,5]      (B)