The answer is letter a. m∠BAD = 108.42<span>°
The solution is as follows:
If </span>m∠BAC = 40.62° and m∠BCA = 30.96°, then
m∠CBA = 180° - m∠BCA - <span>m∠BAC
</span>m∠CBA = <span>108.42°
</span>
Since m∠BAD = m∠CBA due to the parallelogram's property,
<span>m∠BAD</span> = <span>108.42°.</span>
Answer:
Step-by-step explanation:
Answer:
The proposition is true.
Step-by-step explanation:
Now we proceed to demostrate that expression given is true by algebraic means:
1) 
Given
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3) 
Distributive property/
4) 
Commutative, associative and modulative properties/Existence of additive inverse/
5) ![[(x\cdot y)^{-1}]^{-1}\cdot (x^{-2}+y^{-2})](https://tex.z-dn.net/?f=%5B%28x%5Ccdot%20y%29%5E%7B-1%7D%5D%5E%7B-1%7D%5Ccdot%20%28x%5E%7B-2%7D%2By%5E%7B-2%7D%29)
Commutative property/Definition of division
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7) 
Distributive property/Associative property/
8) 
Modulative property/Existence of additive inverse/
9) 
Distributive property
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11) 
Commutative property/Definition of division/Result
