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Yanka [14]
3 years ago
7

Please help me with my math I’m so bad at this

Mathematics
1 answer:
mojhsa [17]3 years ago
7 0

Answer:

9

Step-by-step explanation:

(-9)^1/3 * (-81)^1/3

We can rewrite -81 as 9 * -9

So it can be rewritten as:

(-9)^1/3 * (9*-9)^1/3

Since they are all raised to the 1/3, we can combine the bases:

(-9*9*-9)^1/3 =

(9*9*9)^1/3, because the two negatives turn into a positive:

So this is basically:

(9^3)^1/3 = 9^1 = 9

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Find a compound proposition involving the propositional variables p, q, and r that is true when exactly two of p, q, and r are t
VLD [36.1K]

Answer:

Consider the proposition C=(p∧q∧¬r)∨(p∧¬q∧r)∨(¬p∧q∧r)

Step-by-step explanation:

This compound proposition C uses the outer disjunction (∨) then the proposition is true if and only if one of the three propositions (p∧q∧¬r),(p∧¬q∧r),(¬p∧q∧r) is true.

First, it is impossible that two or three of these propositions are simultaneously true. For example, if (p∧q∧¬r) and (p∧¬q∧r) are both true, then ¬r is true (from the first conjuntion) and r is true (from the second one), a contradiction. All the other possibilities can be discarded reasoning in the same way.

Since these propositions are mutually excluyent, C is true if and only if exactly one of the three propositions is true (and false otherwise). This can only happen if exactly two of p,q, and r are true and the other one is false. For example, (p∧q∧¬r) is true when p and q are true, and r is false.

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3 years ago
Express your answer as a polynomial in standard form.
andrezito [222]
I personally don’t know the answer so i can’t help
4 0
2 years ago
Need some help on my precalculus homework
Pavlova-9 [17]

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and

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6 0
3 years ago
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Slav-nsk [51]

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- - - - - - - - - - - - - - - - - - - -

Answer:

\boxed{\frac{x+3}{18}}

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2 years ago
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ivanzaharov [21]

Answer:

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8-20

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5 0
3 years ago
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