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alukav5142 [94]
3 years ago
9

Factor the expression. 2x^2-7x-15

Mathematics
1 answer:
lutik1710 [3]3 years ago
3 0

Answer:

Factor by grouping

(2x+3) (x-5)

Step-by-step explanation:

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A street magician asks a passerby to draw one card from a standard deck, remember it, and then replace it. The magician then shu
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Answer:

P( At least one of the two cards was a heart)=7/16

Step-by-step explanation:

The solution to this question can be found in two ways.

First way: Since total number of heart in a deck are four,

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=\frac{9}{16}

Thus, Probability that at least one of the two cards was a heart= 1- P( Neither of two cards had a heart= 1- \frac{9}{16}

=\frac{7}{16}

Second way:

Probability that first card drawn is a heart and the second one is not a heart= \frac{1}{4}×\frac{3}{4}

=\frac{3}{16}

Probability that the first card drawn is not a heart and the second one is a heart= \frac{3}{4}×\frac{1}{4}

=\frac{3}{16}

Probability that both cards drawn are hearts= \frac{1}{4}×\frac{1}{4}

=\frac{1}{16}

Adding all these probabilities, we have the probability that at least one of the card drawn was heart= \frac{7}{16}


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Answer: A the mean of plot b is greater than plot a

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2 years ago
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