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Marat540 [252]
3 years ago
7

Factor completely 16a^3b^7 + 2a^6b^4 - 22a^4b^5

Mathematics
1 answer:
Alina [70]3 years ago
4 0

Answer:

2a^3b^4(8b^3+a^3-11ab)

Step-by-step explanation:

as^3b^4(8b^3) +2a^6b^4-22a^4b^5\\2a^3b^4(8b^3)+2a^3b^4(a^3)-22a^4b^5\\2a^3b^4(8b^3)+2a^3b^4(a^3)+2a^3b^4(-11ab)\\2a^3b^4(8b^3+a^3)+2a^3b^4(-11ab)\\2a^3b^4(8b^3+a^3-11ab)

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What odds should a person give in favor of the following events? (a) A card chosen at random from a 52-card deck is an ace. (b)
Sindrei [870]

Answer:

(a) 7.69%

(b) 25%

(c) 2.78%

Step-by-step explanation:

(a)

In a deck of 52 cards there are 4 aces.

The odds in favor or the probability of selecting an ace is:

P(Ace) = \frac{Number\ of\ aces}{Number\ of\ cards\ in\ total}\\ =\frac{4}{52}\\ =0.076923\\\approx7.69\%

Thus, the probability of selecting an ace from a random deck of 562 cards is 7.69%.

(b)

The outcomes of each toss of a coin is independent of the other, since the result of the previous toss does not affect the result of the current toss.

The probability that both the tosses will end up in heads is:

P(2\ Heads)=P(1^{st}\ Head)\times P(2^{nd}\ Head)\\=\frac{1}{2}\times \frac{1}{2}\\ =\frac{1}{4}\\ =0.25\ or\ 25\%\\

Thus, the probability that both the tosses will end up in heads is 25%.

(c)

The sample space of two dice consists of 36 outcomes in total.

Out of these 36 outcomes there is only 1 Boxcar, i.e. two sixes.

The probability of a boxcar when two dice are rolled is:

P(Boxcar)=\frac{Favorable\ outcomes}{Total\ no.\ of\ outcomes}\\= \frac{1}{36}\\ =0.027777\\\approx2.78\%

Thus, the probability of a boxcar when two dice are rolled is 2.78%.

6 0
3 years ago
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3 years ago
(X+2)(X+6) simplify using grouping
Leona [35]
(x+6)(x+2)
Simplifying
(x + 6)(x + 2)

Reorder the terms:
(6 + x)(x + 2)

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(6 + x)(2 + x)

Multiply (6 + x) * (2 + x)
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((2 * 6 + x * 6) + x(2 + x))
((12 + 6x) + x(2 + x))
(12 + 6x + (2 * x + x * x))
(12 + 6x + (2x + x2))

Combine like terms: 6x + 2x = 8x
(12 + 8x + x2)
6 0
3 years ago
Read 2 more answers
Solve for x, and JUSTIFY your answer
Rashid [163]

Answer:

60

Step-by-step explanation:

every angle is the same and 1/3 of 180 is 60

7 0
3 years ago
How long does it take to travel 240 km at a constant speed of 12 km/h?
tankabanditka [31]

Answer:

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Step-by-step explanation:

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d = rt

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Divide each side by 12

240/12 = 12t/12

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4 years ago
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