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3 years ago

Pls hurry will give brainliest

Mathematics

1 answer:

Ket [755]3 years ago

5 0

Answer:

The nation was divided by religion and history. Most of the people in Myanmar were Buddhist, but a minority were Muslim. They lived mostly on the western edge of the country, in a section known as the Rakhine State. It is one of seven states within the nation. They were known as Rohingya.

During World War II, the Buddhist population fought for the Japanese, who occupied the island. The Rohingya sided with the Allies. They hoped to gain independence after the war, but that did not happen.

The government then began doing things to harm the Muslims. In 1982, they took away civil rights for the Rohingya. They could not go to school or have health care. Thousands began leaving the country.

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4. [5 pts] Describe how and why the formula for permutations differs from the formula for combinations.

ivann1987 [24]

Answer:

They are different because of the order in the permutation matters. In combination, the order doesn't matter. In other words in a permutation 123 and 132 are different but in a combination are the same group (they have the same digits 1,2, and 3).

Step-by-step explanation:

The formula of the permutation is $P(n,r)=\frac{n!}{(n-r)!}$ , when you are performing a permutation you pick r objects from a total of n, for the first pick you can choose from n, but for the second you have n-1, and this continues to your pick number r in which you will choose from n-r+1, and the total of permutation is the multiplicación of this number of choices for each pick, like this:

$n(n-1)(n-2)...(n-r+1)$

If $n!=n(n-1)(n-2)...(n-r+1)(n-r)(n-r-1)...(1)$ and $(n-r)!=(n-r)(n-r-1)(n-r-2)...(1)$

$\frac{n!}{(n-r)!}=\frac{n(n-1)(n-2)...(n-r+1)(n-r)(n-r-1)...(1)}{(n-r)(n-r-1)(n-r-2)...(1)}$

The factor equals above and under cancel each other.

$\frac{n!}{(n-r)!}=\frac{n(n-1)(n-2)...(n-r+1)(n-r)(n-r-1)...(1)}{(n-r)(n-r-1)(n-r-2)...(1)}\\\frac{n!}{(n-r)!}=n(n-1)(n-2)...(n-r+1)$

In combination, the order of the element isn't important, so from the total of permutation you have to eliminate the ones with the same objects with different order and counting just once each group, when choosing r objects the total of permutation for a single group of r objects is: $r(r-1)(r-2)...(1)=r!$ . If you divide the total of permutations of n taking r by r! you get the combinations (where the order is not important). The formula of the combination is $C(n,r)=\frac{n!}{r!(n-r)!}$ .

4 0

4 years ago

Can someone helpppppppp

ankoles [38]

Answer:

f(-2) = -3

Step-by-step explanation:

When x = -2 we want the value of y

We use the closed circle value ( open circle does not have a value)

f(-2) = -3

6 0

3 years ago

A device is rated at 1,100 watts.what current is required if it is operated at 110 volts?

WINSTONCH [101]

1 ) Watts =E * I = 110 * 5 = 550 watts =.55 KW

2) I = Watts / e = 1100 / 110 = 10 amperes

3) 1 horsepower = 33000 ft/lbs per minute

HP = ( 2000 * 1000) / (33000 *4) = 15.1515 hp

4) cost = (10 * 100 / 1000) *11 * $0.10 = $1.10

5) This answer will be incorrect because you have not stated the power factor of the motor.

va = I * E = 7.5 * 240 = 1800

2 hp = 2 * 746 watts = 1492 watts

If the motor had a 1.0 power factor (it doesn't) the efficiency would be

efficiency = output / input = 1492 / 1800 = 82.888 %

6) I = watts / E =1000 / 120 = 8.333 amps

7) 1 = watts / E = 1000 / 240 = 4.1616

8) Kw-hr = (2 * 24 * 365 ) / 1000 = 17.52

cost = kw-hr * $0.03 = 17.52 * $0.03 = $0.5256

9) efficiency = (115 * 240) / (2400 * 12) = 95.8333 %

10) KW = (I^2 * R) / 1000 = (20^2 * 5) / 1000 = 2

5 0

3 years ago

Help me please I need an explanation.!

levacccp [35]

Answer:

Step-by-step explanation:

An ordered pair is a point on a coordinate graph that represents data. The x represents an independent variable and the y a dependent. Your y is your vertical axis. Each square on this graph represents 50 feet. The line on your graph hits the intersection between 2 minutes and 100 feet. Therefore (2,100) Is an ordered pair

4 0

4 years ago

What is “ f(x) = 2x^2- 32x” in standard form if it has one?

kap26 [50]

Most textbooks interpret standard form of a quadratic function to be as follows:

f(x) = $a x^{2} + bx + c$

In the function f(x) = $2 x^{2} - 32x$ , notice we do not have a value for "c". Just place a "0" in for the c and you have standard form.

the criteria for standard form:
1. All like terms are combined
2. Degree must drop from left to right
3. The leading coefficient cannot be equal to zero.

6 0

4 years ago