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zvonat [6]
3 years ago
8

True or False: The domain of an inverse of a relation is the domain of the original relation.

Mathematics
1 answer:
Oliga [24]3 years ago
3 0
This statement is false

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Each of the 25 balls in a certain box is either red, blue or white and has a number from 1 to 10 painted on it. If one ball is t
Aneli [31]

Answer:

Not sufficient information

Step-by-step explanation:

Probability of white ball: P(W)

Probability of even number: P(E)

Probability of white ball or even number: P(W∨E) is asked

Considering case (1):

Probability of white ball and even number: P(W∧E) = 0

And we know that,

P(W∨E) = P(W) + P(E) - P(W∧E) = P(W) + P(E) - 0 = P(W) + P(E)

It is not sufficient to calculate the desired probability.

Considering case (2):

P(W) - P(E) = 0.2

Here, it is possible for P(W) and P(E) to get multiply values.

So P(W∨E) cannot be determined.

Considering cases (1) & (2):

P(W∧E) = 0 and P(W) - P(E) = 0.2

So, P(W∨E) = P(W) + P(E) = P(E) + 0.2 + P(E) = 2P(E) + 0.2

Again multiple answers are possible.

Such as, for P(E) = 0.4 (10 even balls) ⇒ P(W∨E) = 1

but for P(E) = 0.2 (5 even balls) ⇒ P(W∨E) = 0.6

So, the information are not sufficient.

3 0
3 years ago
If c = 4 and d = 5, find c:d.<br><br> 1:5<br> 4:5<br> 5:4
nadya68 [22]
The answer would be the second choice. 4:5
5 0
3 years ago
Read 2 more answers
Can someone help plz
Ivenika [448]

Answer:

X=27

Step-by-step explanation:

\frac{24}{32}  =  \frac{30}{40}  =  \frac{x}{36}

so x=27

4 0
3 years ago
Annete is suveyeing people in the city about their interest in a new shopping mall. She found that 180 people, or 37.5% of those
VLD [36.1K]

she surveyed "x" amount, which is the 100%, but we also know that 180 is the 37.5%, so


\bf \begin{array}{ccll} amount&\%\\ \cline{1-2} x&100\\ 180&37.5 \end{array}\implies \cfrac{x}{180}=\cfrac{100}{37.5}\implies 37.5x=18000 \\\\\\ x=\cfrac{18000}{37.5}\implies x=480

8 0
3 years ago
Can someone help me with this
Over [174]

I think the answer is D, because P is the new price, n is the original price, then you multiply 0.25 by the original price and then subtract it by the original price.

5 0
3 years ago
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