Answer:
9-4+(5x3)
Step-by-step explanation:
9-4+15
24-4
20
The other person is right he deserves brain thing
Answer:
Step-by-step explanation:
3y + 10 = -2y + 15
5y + 10 = 15
5y = 5
y = 1
x = 3(1) + 10
x = 3 + 10
x = 13
(13, 1)
Answer:
see attached
Step-by-step explanation:
The truth table technique shows the first proposition is True. However, the second proposition cannot be shown to be a tautology, because it isn't true.
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<h3>a.</h3>
The "equals" relation is commutative: (a=b) ≡ (b=a), hence the expression ...
(p=q)∧(q=p)
is equivalent to
(p=q)∧(p=q)
We know that the And of p with itself is just p, so that fact ensures the truth of ...
(p=q)∧(p=q) = (p=q)
Hence
(p=q)∧(q=p) = (p=q)
The top truth table in the attached shows the final comparison of the two expressions is true for all values of p and q.
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<h3>b.</h3>
The attached truth table shows that the given relation is <em>not a tautology</em>.