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3 years ago

What is the formula for P^c(n,r)

1 answer:

6 0

P(n,r)= n! /(n-r)!
C(n,r)= n! / r! (n-r)! 
P^c(n,r)= P raised to power C(n.r)? (If so, you know C(n,r) ; raise P to power C(n,r)) 
P(A/B) = P(A ∩ B) / P(B)
Hope this helped :)

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The 25 members of the Reading Club are buying a book to discuss at the next meeting. The club leader got a special price; the bo

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3 years ago

Factor completely and then place the factors in the proper location on the grid a^2-a-20

Gnoma [55]

Answer:

$(x-5)(x+4)$

Step-by-step explanation:

We have the following quadratic equation

$a^2-a-20$

The factored expression will have the following form

$(x+b)(x+c)$

Where b and c are two real numbers which when added together result in -1, and multiplying them results in -20

$b*c=-20\\b+c=-1$

You can verify that the numbers that meet this condition are:

-5 and 4

Then the factors are:

$(x-5)(x+4)$

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3 years ago

Can smbdy help me???

Sergio [31]

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Answer:

a. One solution

Step-by-step explanation:

These are two linear equations with different x-coefficients. They have one solution.

Additional comment

If the x-coefficients are the same, the system may have 0 or infinite solutions, depending on the constants. It is not possible for a system of linear equations to have exactly two solutions.

3 0

3 years ago

The picture shows the footprints of a man walking. The pace length P is the distance between the rear of two consecutive footpri

Rina8888 [55]

Bernard’s walking speed is 140 meters per minute

Bernard’s walking speed is 8.4 kilometers per hour

Step-by-step explanation:

The pace length P is the distance between the rear of two consecutive footprints

The formula, n P = 140, gives an approximate relationship between n and P where,

n = number of steps per minute
P = pace length in meters
Bernard knows his pace length is 0.80 meters
The formula applies to Bernard’s walking

We need to calculate Bernard’s walking speed in meters per minute and in kilometers per hour

∵ n = number of steps per minute

∴ n unit is number / minute

∵ P = pace length in meters

∴ P unit is meter

- That means n P unit is meters/minute

∴ n P represents the speed in meters per second

∵ The formula applies to Bernard’s walking

∵ His pace length is 0.80 meters

∵ n P = 140

∴ n(0.8) = 140

- Divide both sides by 0.8

∴ n = 175

- That means he moves 175 steps per minute

∵ The distance he walks in minute = 175 × 0.8 = 140 meters/minute

∴ His speed is 140 meters per minute

Bernard’s walking speed is 140 meters per minute

∵ 1 km = 1000 m

∵ 1 hour = 60 minutes

- Divide the meters by 1000 and the minute by 60 to change

from meters per minute to kilometers per hour

∴ His walking speed = $\frac{140}{1000}$ ÷ $\frac{1}{60}$

- Change ÷ to × and reciprocal the fraction after the division sign

∴ His walking speed = $\frac{140}{1000}$ × $\frac{60}{1}$ = 8.4 km/h

Bernard’s walking speed is 8.4 kilometers per hour

Learn more:

You can learn more about the speed in brainly.com/question/5461619

#LearnwithBrainly

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4 years ago

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Answer:-2/3 gallon per minute

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Step-by-step explanation:

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3 years ago