Answer if D hope it helps!
        
             
        
        
        
Answer:
Identity property
Step-by-step explanation:
Identity property of multiplication: The product of 1 and any number is that number. For example, 7 × 1 = 7 7 \times 1 = 7 7×1=77, times, 1, equals, 7.
I hope it's helpful!
 
        
             
        
        
        
Answer:
   You can use either of the following to find "a":
- Pythagorean theorem
- Law of Cosines
Step-by-step explanation:
It looks like you have an isosceles trapezoid with one base 12.6 ft and a height of 15 ft.
I find it reasonably convenient to find the length of x using the sine of the 70° angle:
   x = (15 ft)/sin(70°)
   x ≈ 15.96 ft
That is not what you asked, but this value is sufficiently different from what is marked on your diagram, that I thought it might be helpful.
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Consider the diagram below. The relation between DE and AE can be written as ...
   DE/AE = tan(70°)
   AE = DE/tan(70°) = DE·tan(20°)
   AE = 15·tan(20°) ≈ 5.459554
Then the length EC is ...
   EC = AC - AE
   EC = 6.3 - DE·tan(20°) ≈ 0.840446
Now, we can find DC using the Pythagorean theorem:
   DC² = DE² + EC²
   DC = √(15² +0.840446²) ≈ 15.023527
   a ≈ 15.02 ft
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You can also make use of the Law of Cosines and the lengths x=AD and AC to find "a". (Do not round intermediate values from calculations.)
   DC² = AD² + AC² - 2·AD·AC·cos(A)
   a² = x² +6.3² -2·6.3x·cos(70°) ≈ 225.70635
   a = √225.70635 ≈ 15.0235 . . . feet
 
        
             
        
        
        
Answer:-10
Step-by-step explanation:
45 +5=-5x
-5x=50
X=-10
 
        
                    
             
        
        
        
1 3/8. If you would like me to explain lmk!