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Orlov [11]
4 years ago
7

Hi, the answer is K but can anyone show why

Mathematics
1 answer:
dlinn [17]4 years ago
3 0

Let's do 51 and 52.

51. The contrapositive has the same truth value as the original statement. That's opposed to the converse, which may or may not be true independent of the original statement.

The contrapositive of IF P THEN Q is IF not Q THEN not P.  They're equivalent.  Here that's If the cat is not female then it is not tricolor.

Answer: C

52.  

(x^3)^{(4-b^2)}=1

x^{3(4-b^2)} = 1

For the statement to be true, the exponent must be zero:

3(4-b^2) = 0

b^2 = 4

b = \pm 2

Both positive 2 and negative 2 have a square of 4.

Answer: K

By the way, usually we assume 0^0=1 so the restriction that x \ne 0 isn't really necessary.  Think of the definition of a polynomial or the binomial expansion:

\displaystyle f(x)=\sum_{k=0}^n a_k x^k

\displaystyle(x+y)^n=\sum_{k=0}^n {n \choose k} x^{k}y^{n-k}

For these common equalities to work when x=0 we need to define 0^0=1


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Answer:

The operations you see with you eyes are multiplication and addition.

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The operations you don't see are Subtraction and Division.

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3 0
3 years ago
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vova2212 [387]

Answer:

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Step-by-step explanation:

Let l be the length of the garden and let w be the width:

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3 years ago
Find the exact value of tan 15 degrees
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There's also a formula for tan(a-b), but I couldn't remember it off hand.</span>
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3 years ago
You start at (5, -3). you move up 8 units. where do you end?
djyliett [7]

Answer:

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