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Anastaziya [24]
3 years ago
6

I think that the conclusion is AB is congruent to DE and reasoning is subtraction property, but need someone to check

Mathematics
1 answer:
jenyasd209 [6]3 years ago
4 0

Answer:

yes that is correct if they are on the same line

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A 13 card hand is dealt from a well-shuffled standard 52-card deck. What is the probability that 4 red cards and 9 black cards a
GaryK [48]

The probability that 4 red cards and 9 black cards are dealt is 0.0735.

Let E be the event that 4 red cards and 9 black cards are dealt.

According to the given question.

Number of card hand that is dealt from a well-shuffled standard 52- card deck is 13

Total number of red cards in a well shuffled card deck = 26

Total number of black cards in a well shuffled card = 26

Now, the number of ways to dealt 13 cards = ^{52} C_{13}

Number of ways to dealt 9 black cards = ^{26}C_{9}

And, the number of ways to dealt 4 red cards = ^{26} C_{4}

As, we know that the probability of an event is calculated by taking the ratio of the favorable outcomes to the total number of outcomes.

Therefore, the the probability that 4 red cards and 9 black cards are dealt is given by

P(E) = \frac{^{26}C_{9}\times \ ^{26}C_{4}    }{^{52}C_{13}  }

⇒ P(E) = \frac{\frac{26!26!}{9!4!17!22!} }{\frac{52!}{13!39!} }

⇒ P(E) = 0.0735

Hence, the probability that 4 red cards and 9 black cards are dealt is 0.0735.

Find out more information about probability here:

brainly.com/question/14530583

#SPJ4

3 0
2 years ago
Each of the following integrals represents the volume of either a hemisphere or a cone, and the variable of integration measures
iris [78.8K]

Answer:

1. cone

   radius, height = 2, 10

  volume = 13.33

2. hemisphere

   radius=  14

  volume = 1829.33

Step-by-step explanation:

The  region  described  has  a  radius r=2−y/5, therefore, the volume is a cone

radius, height = 2, 10

volume =

\int\limits^{10}_0 {\pi ( 2-\frac{y}{5} )^2} \, dy \\=

= 13.33

2. The  region  ∫14 0 π(196 - h^2) dh   has  a  radius 196 - h^2,  so the volume is a hemisphere

radius  = 14

volume

=\int\limits^{14}_0 {\pi (196 - h^{2}  )} \, dh

=\pi (196h- \frac{h^3}{3}) |^{14}_0

=1829.33

6 0
3 years ago
Please help me! I will give brainliest to the person who answers correctly.
Sveta_85 [38]

Answer:

  • sin(X) = 6/7.5
  • XY = 4.5
  • cos(X) = 4.5/7.5
  • tan(X) = 6/4.5

Step-by-step explanation:

It is convenient to use the Pythagorean theorem to find XY to start with. That theorem tells you ...

  XZ² = YZ² + XY²

Solving for XY, you find ...

  XY² = XZ² - YZ²

  XY = √(XZ² - YZ²) = √(7.5² -6²) = √(56.25 -36) = √20.25

  XY = 4.5

The mnemonic SOH CAH TOA is very helpful here. It reminds you that ...

  Sin = Opposite/Hypotenuse

  sin(X) = 6/7.5

  Cos = Adjacent/Hypotenuse

  cos(X) = 4.5/7.5

  Tan = Opposite/Adjacent

  tan(X) = 6/4.5

_____

<em>Comment on the triangle and ratios</em>

The side lengths of this triangle are in the ratios ...

  XY : YZ : XZ = 3 : 4 : 5

If you recognize that the given sides are in the ratio 4 : 5, this tells you that you have a "3-4-5" right triangle with a scale factor of 1.5. At least, you can find XY = 1.5·3 = 4.5 with no further trouble.

The trig ratios could be reduced to sin(X) = 4/5; cos(X) = 3/5; tan(X) = 4/3, but the wording "don't simplify" suggests you want the numbers shown on the diagram, not their reduced ratios.

3 0
4 years ago
Tymere says that 7/10 × 7/10 equals 49/10. Which of the statements below is true?
Xelga [282]
The answer would be the second option because 49/10 is equal to  4 9/10 which is greater than 7/10
3 0
3 years ago
What is 4/6 + 5/6<br> If you could answer plz &lt;3
Vikentia [17]

Answer: 9/6. The simplified answer would be 1 1/2!

7 0
3 years ago
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