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3 years ago

PLEASE HELP AND I NEED STEP BY STEP EXPLNATION

Mathematics

1 answer:

natulia [17]3 years ago

3 0

The answer would be 12 feet square.

That’s because taking out the square is taking out an area of 4 feet square. If you substitute the 4 feet square back in, that would fill in the empty spot marked with the 2 feet by 2 feet dimensions. Then, you could treat it like a rectangle of 4 by 3. If you multiply them you’ll get 12 feet square which is your answer. Hope this helps

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A man has n keys on a key ring, one of which opens the door to his apartment. Having celebrated a bit too much one evening, he r

schepotkina [342]

Answer:

The value is $P(3) = \frac{1}{n}$

Step-by-step explanation:

From the question we are told that

The number of keys is n

The number of keys remaining after the first key is chosen is n-1

The probability that he gains entrance with the first key he selects is $\frac{1}{n}$

Generally the probability that the first key does not open the door is

$p(F_1) = 1 - \frac{1}{n} = \frac{n-1}{n}$

Generally the number of keys remaining after the second key is chosen is

n-2

Generally the probability that he gains entrance with the second key he selects is

$\frac{1}{n-1}$

Generally the probability that the second key does not opens the door is

$P(F_2) = 1- \frac{1}{n-1} = \frac{n-2}{n-1}$

Generally the probability that he gains entrance with the third key he selects is

$\frac{1}{n-2}$

Generally the probability that the door opens with the third key

$P(3) = p(F_1) * P(F_2) * \frac{1}{n-2}$

=> $P(3) = \frac{n-1}{n} * \frac{n-2}{n-1} * \frac{n-2}{n-1}$

=> $P(3) = \frac{1}{n}$

Note :

All the outcome of the events are independent

7 0

4 years ago

What is the value of the expression |a + b| + |c| when a = –5, b = 8, and c = –13?

Semmy [17]

For the first problem, your answer is D, 16, because -5+8=3, and 3+ |-13|=16, because the absolute value of -13=13
for the 2nd, B is the correct answer. -4.37 is smaller than -1.63,
the 3rd one is C, 19. -14+19=5,
the 4th one the answer is D, -20.1 because 12.7+ -20.1=-7.4
1=D
2=B
3=C
4=D

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3 years ago

Which theme is found throughout the interview with Florence Griffith-Joyner ?

Katena32 [7]

B is the answer I’m pretty sure

5 0

3 years ago

Read 2 more answers

A lilac Bush is 2m tall.A rose Bush is 165cm tall.The lilac bush is how many centimeters taller than the rose bush?

torisob [31]

Answer:

35 cm

Step-by-step explanation:

2m = 200cm

200cm-165cm=35cm

4 0

3 years ago

Plz help!!!!!! Plz!!!!!!

Furkat [3]

Answer: x=4

x+4=2x

-x -x

4=x

I hope this helps:

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3 years ago