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2 years ago

What is (x+5)(x-1) ? ( expanding brackets )

Mathematics

1 answer:

maks197457 [2]2 years ago

3 0

Answer:

x^2 + 4x - 5

Step-by-step explanation:

We need to simplify this

xx - 1 * x +5x - 5 * 1

Simplify further

x^2 + 4x - 5

Thus, we have our answer

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A card is drawn at random from a standard deck of 52 cards. Find the following conditional probabilities. a) The card is a diam

Inga [223]

Answer:

$a.\frac{1}{13}\\b.\frac{1}{2}\\c.\frac{1}{13}\\d.\frac{1}{13}$

Step-by-step explanation:

P(A|B) = P(A and B) / P(B)

Total number of cards = 52

Let A denotes the event that the card is a diamond and B denotes the card is red.

$P\left ( A|B \right )=\frac{P\left ( A\cap B \right )}{P(B)}\\=\frac{\frac{2}{52}}{\frac{26}{52}}\\=\frac{1}{13}$

Let A denotes the event that the card is red and B denotes the card is diamond.

$P\left ( A|B \right )=\frac{P\left ( A\cap B \right )}{P(B)}=\frac{\frac{2}{52}}{\frac{4}{52}}\\=\frac{1}{2}$

Let A denotes the event that the card is nine and B denotes the card is red.

$P\left ( A|B \right )=\frac{P\left ( A\cap B \right )}{P(B)}=\frac{\frac{2}{52}}{\frac{26}{52}}\\=\frac{1}{13}$

Let A denotes the event that the card is a king and B denotes the card is a face card.

$P\left ( A|B \right )=\frac{P\left ( A\cap B \right )}{P(B)}=\frac{\frac{4}{52}}{\frac{12}{52}}\\=\frac{1}{13}$

7 0

2 years ago

Pls help me guys I'm so stuck on this!

Nikitich [7]

$x+x+x+5+5=3x+10$

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2 years ago

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I GIVEE BRAINLILSTTTT

valentinak56 [21]

Answer:

liu;;ui;ui;iu;iu;

Step-by-step explanation:

iu;ui;iu;iiu;

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2 years ago

It costs $50 to join a bowling club plus a monthly fee, the total costs for the year is $350

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Your friend draws the diagram at the right

polet [3.4K]

Answer:

What he did wrong is that he did not flip all of the points. since S is 1 point up, it would then reflect 1 point down. point P is 3 up and the reflection should be 3 down. Q should be 3 down as well and R is 1 down below the x axis. The Y does not move for all of the points.

Step-by-step explanation:

I hope this helps!

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2 years ago