I Need help fast I’d really appreciate it!

Given:

[tex]P(7,2)[/tex]

To find:

The value of the given permutation.

Solution:

Permutation is defined as:

[tex]P(n,r)=\dfrac{n!}{(n-r)!}[/tex]

We have,

[tex]P(7,2)[/tex]

Using permutation formula, we get

[tex]P(7,2)=\dfrac{7!}{(7-2)!}[/tex]

[tex]P(7,2)=\dfrac{7\times 6\times 5!}{5!}[/tex]

[tex]P(7,2)=7\times 6[/tex]

[tex]P(7,2)=42[/tex]

Therefore, the value of P(7,2) is 42.

Answer:

x = 73

Step-by-step explanation:

Δ ABC and Δ DEF are congruent, same 3 angles in the same position in both triangles, so

Corresponding sides will be congruent, that is

x = ED = BA = 73

Answer:

A.  7n+6

B Three times the quantity of a number plus eight

Step-by-step explanation:

A   more than means it comes after

7 times a number

7n

6 more than

7n+6

B 3( n+8)

Three times the quantity of a number plus eight

Answer:

Part A: 84, 105

Part B: $315

Step-by-step explanation:

Part A:

4 student tickets + 5 adult ticekts = 9 tickets

The ratio of student tickets to adult tickets to total tickets is

4 : 5 : 9

He sold x times more tickets than the numbers on the ratio.

He sold 9x tickets.

9x = 189

x = 21

Student tickets:

4x = 4(21) = 84

He sold 84 student tickets.

Adult tickets:

5x = 5(21) = 105

He sold 105 adult tickets.

Part B:

Student tickets:

He sold 84 student tickets at $5 each.

The amount of money from the sale of student tickets is:

84 * $5 = $420

Adult tickets:

He sold 105 adult tickets at $7 each.

The amount of money from the sale of adult tickets is:

105 * $7 = $735

Difference:

$735 - $420 = $315

84 student tickets, 105 adult tickets were sold by Jin and $315  more money does Jin receive from selling adult tickets than from selling student tickets

Two or more expressions with an Equal sign is called as Equation

The ratio of student tickets to adult tickets sold is 4 : 5

4 student tickets + 5 adult ticekts = 189

4x+5x=189

9x = 189

Divide both sides by 9

x = 21

The number of Student tickets:

4x = 4(21) = 84

Jin sold 84 student tickets.

Adult tickets:

5x = 5(21) = 105

Jin sold 105 adult tickets.

Part B:

He sold 84 student tickets at $5 each.

The amount of money from the sale of student tickets is:

84 * $5 = $420

Adult tickets:

He sold 105 adult tickets at $7 each.

The amount of money from the sale of adult tickets is:

105 * $7 = $735

Difference:

$735 - $420 = $315

Hence 84 student tickets, 105 adult tickets were sold by Jin and $315  more money does Jin receive from selling adult tickets than from selling student tickets

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Answer:

85 degree

Step-by-step explanation:

The angle vertically opposite to 85 be y

y = 85 (since V.O.A are equal)

Then x and y are corresponding angles

x = 85 (since corresponding angles are equal)

Hope u understand

Please mark as brainliest

Thnk You

Answer:

C = 2d + 15

Step-by-step explanation:

$2 per km, so $40 for 20km.

55-40 is 15 so $15 is a fixed price.

Hence, C = 2d + 15

Answer: HI There I think that I can help You!

Girls:

Range:66

Lower Quartile: 22

Upper Quartile: 56

IQ Range: 34

Mean Absolute Deviation: 19.4

Boys:

Range: 75

Lower Quartile: 12

Upper Quartile: 45

IQ Range: 33

Mean Absolute Deviation: 20.8

Step-by-step explanation:

Answer:

give my guy that brainliest

Step-by-step explanation:

Answer:

150

Step-by-step explanation:

t = sqrt((4π^2mr)/F)

Plug in the given values.

12 = sqrt((4(3.14^2)(84.4)(6.5))/F)

Solve for F.

12 = sqrt(21635.90624/F)

144 = 21635.90624/F

F = 150.249

Step-by-step explanation:

When they ask what the prob that at most 3/4 people asked have a pet, they are asking what is the prob that 0, 1, 2, or 3 people answer yes. So you could calculate all 4 of those and then add them together.

However, in this case, since there's only 1 other possible outcome (all 4 have a pet), we could just calculate the prob of that and subtract it from 1 to get the prob of everything else happening.

We'll use the binomial distribution formula where n=4, k=4, and P=.6.

nCk * P^n * (1-P)^(n-k)4C4 * (.6)^4 * (.4)^0.1296

So the prob of at least 3 having pets = 1 - P(all 4 have pets) which is 1-.1296 = .8704.  You could double check this by calculating the prob of the other 4 outcomes and then adding them together.

The probability that at least 2 people have a cat is 0.522 or 52.2%.

Probability is defined as the possibility of an event being equal to the ratio of the number of favorable outcomes and the total number of outcomes.

This is a problem that can be solved using the binomial probability formula, which gives the probability of getting exactly k successes (in this case, people with cats) out of n trials (in this case, people you ask) with a probability of success (in this case, having a cat) of p.

The formula is:

P(k) = (n choose k) × [tex]p^k \times (1-p)^{(n-k)}[/tex]

where (n choose k) is the binomial coefficient, which is equal to n! / (k! × (n-k)!).

For this problem, n = 5 (the number of people you ask), k = 2 (the number of people who have cats), and p = 0.3 (the probability of a person having a cat, according to the survey).

P(2) = (5 choose 2) × 0.3² × 0.7³

P(2) = 0.252

To find the probability of at least 2 people having a cat, we have to add up the probability of getting exactly 2, 3, 4, and 5 people having cats.

P(≥2) = P(2) + P(3) + P(4) + P(5)

Substituting the values we get:

P(≥2) = 0.252 + 0.189 + 0.072 + 0.009 = 0.522

So, the probability that at least 2 people have a cat is 0.522 or 52.2%.

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Answer:

Step-by-step explanation:

5). Triangle DEF is an equilateral triangle.

Therefore, measure of all sides and the angles of the triangle will be equal.

DE = EF = DF = 5.2 ft

3y + 1 = 5.2

3y = 5.2 - 1

3y = 4.2

y = 1.4

Similarly, m∠D = 60° [Measure of all angles of an isosceles triangle = 60°]

(5x)° = 60°

x = [tex]\frac{60}{5}[/tex]

x = 12

6). Property to be used in ΔFGH,

"Two sides of an isosceles triangle are equal in measure and opposite angles of the equal sides of the triangle are equal"

FG = GH

3y = 12.9

y = 4.3

m∠F = m∠H

4x = 44

x = 11

Answer:

110°

Step-by-step explanation:

t+(t+10)+(t+20)=180

t+t+10+t+20=180

3t=180-10-20

3t=150

t=50°

t+20=50+20

=70

180-70=110°

Answer:

32

Step-by-step explanation:

25% of 32 is 8. 100% of 32 is 32, therefore 25 percent of 32 equals 8.

Answer:

$.08

Step-by-step explanation:

it takes 0.4 per hour and it costs $0.20 per hour so you multiply the two numbers together.

0.4 x 0.20 = $.08

Answer:

1i)-7  ii)15  iii)-17   iv)8   v)5

2i)5 ii)-34  iii)-82  iv)1 v)0

Step-by-step explanation:

The numerator is the number on the top of a fraction

The denominator is the numer on the bottom of the faction.

Answer:

Step-by-step explanation:

1. Numerator

(i)    (-7)/5         = -7

(ii)    15/(-4)       = 15

(iii)    (-17)/(-21)    = 17/21 = 17

(iv)    8/9           = 8

(v)    5 = 5/1       = 5

2. Denominator

(I)     (-4)/5        = 5

(ii)    (11)/(-34)     = -34

(iii)   (-15)/(-82)    = (15/82) = 82

(iv)    15 = 15/ 1    = 1

(v)     0 = 0/1       =  1

[tex]3. \ \frac{(-3) \times 4}{7} \ , \ \frac{(34-23) \times (7-4)}{11}[/tex]

4. Rational numbers as integers

 (17)/1    = 17

 (-23)/1  = -23

  35/1    = 35

  (-77)/1  = -77

  91/1    = 91

Answer:

I don't know the answer I just need the points

Step-by-step explanation:

..

Answer:

F= 180 - (127°+33.5°)

180- 160.5

= 19.5°

Step-by-step explanation:

Angles in a triangle add up to 180°

Step-by-step explanation:

127° + 33.5° + F = 180° (Angle sum property)

160.5° + F = 180°

F = 180° - 160.5° = 19.5

Therefore, F = 19.5

Answer:

Step-by-step explanation:

The even numbers less than 10 are

2  which can only be done 1 way: when you roll snake eyes.

4  can be done 3 ways (2,2) (3,1) and (1, 3)

6 can be done 5 ways (2,4) (4,2) (5,1) (1,5) and (3,3)

8 can be done 5 ways (4,4) (2,6)(6,2)(5,3) and (3, 5)

There are 36 ways of throwing the number cubes.

We have a total of 5 + 5 + 3 + 1 = 14 ways

The answer you want is

14/36 = 7 / 18 = 0.389

Answer:

Step-by-step explanation:

y = f(x + 2) +1

Answer:

C. 5.2

Step-by-step explanation:

5.2

Answer:

C. 5.2

Step-by-step explanation:

Answer:

12(6^2-6x3)= 216

3^2 = 9

Step-by-step explanation:

216/9 = 24

Answer:

These responses do show strong evidence that the 75% figure is accurate for current high school graduates going off to attend college

Step-by-step explanation:

1453/2000 = .7265 or 72.65%

If 1,453 students of a 2,000 student high school attend college after high school, than 72.65% of the students in the high school on average will attend college after they graduate. This percentage compared to the 1990's are a mere 2.35% behind the 75% mark. In this example that is the difference between 1,453 students and 1,500 students. Since these percentages are relatively similar, a conclusion could be made that the 75% mark is an accurate average representation of how many high school graduates will attend college in the future.

0 - 17i

Given expression;

i⁸⁰ + i³⁸ - i17

To express the expression in the form a+bi;

i. Rewrite the expression such that it contains terms in i²

(i²)⁴⁰ + (i²)¹⁹ - i17

ii. Solve the result from (i) above using the identity i² = -1

We know that the square root of -1 is i. i.e

[tex]\sqrt{-1} = i[/tex]

Squaring both sides gives

=> [tex](\sqrt{-1} )^{2} = i^{2}[/tex]

=> -1 = i²

Therefore,

i² = -1

Substitute i² = -1 in step (i) above

(-1)⁴⁰ + (-1)¹⁹ - i17

(iii) Solve the result in (ii)

We know that the when a negative number is raised to the power of an even number, the result is a positive number. If it is raised to the power of an odd number, the result is a negative number. Therefore,

(-1)⁴⁰ + (-1)¹⁹ - i17 becomes

1 + (-1) - i17

0 - i17

(iv) Write the result from (iii) in the form a+bi

0 - 17i

Answer:

21

Step-by-step explanation:

Place the values in ascending order like this:

17,18,21,21,21,23,25,25,27

Find the middle value:

21

So 21 is the median

Answer:

x² + 2

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Distributive Property

Algebra I

Step-by-step explanation:

Step 1: Define

Identify

(7x² + 8x - 4) - (6x² + 8x - 6)

Step 2: Simplify

Answer:

x ² + 2

Step-by-step explanation:

7 x² + 8 x - 4 - 6 x² + 8 x - 6

combine like terms

7 x² - 6 x² + 8 x - 8 x - 4 + 6

x² - 4 + 6

x ² + 2

Answer:

Step-by-step explanation:

pythagors theorem

a^2+b^2=c^2

15^2+x^2=21^2

225+x^2=441

x^2=441-225

x=[tex]\sqrt{216[/tex]

x=6[tex]\sqrt{6[/tex]

=14.69

x=14.7 km

Answer:

The equation of the line that passes through the points

(-4,4) and (6,4)

is

y=+4

Step-by-step explanation:

First of all, remember what the equation of a line is:

y = mx+b

Where:

m is the slope, and

b is the y-intercept

First, let's find what m is, the slope of the line...

The slope of a line is a measure of how fast the line "goes up" or "goes down". A large slope means the line goes up or down really fast (a very steep line). Small slopes means the line isn't very steep. A slope of zero means the line has no steepness at all; it is perfectly horizontal.

For lines like these, the slope is always defined as "the change in y over the change in x" or, in equation form:

m= y2-y1/ x2-x1

So what we need now are the two points you gave that the line passes through. Let's call the first point you gave, (-4,4), point #1, so the x and y numbers given will be called x1 and y1. Or, x1=-4 and y1=4.

Also, let's call the second point you gave, (6,4), point #2, so the x and y numbers here will be called x2 and y2. Or, x2=6 and y2=4.

Now, just plug the numbers into the formula for m above, like this:

m=0

So, we have the first piece to finding the equation of this line, and we can fill it into y=mx+b like this:

y=0x+b

Now, what about b, the y-intercept?

To find b, think about what your (x,y) points mean:

(-4,4). When x of the line is -4, y of the line must be 4.

(6,4). When x of the line is 6, y of the line must be 4.

Because you said the line passes through each one of these two points, right?

Now, look at our line's equation so far: y=0x+b. b is what we want, the 0 is already set and x and y are just two "free variables" sitting there. We can plug anything we want in for x and y here, but we want the equation for the line that specfically passes through the two points (-4,4) and (6,4).

So, why not plug in for x and y from one of our (x,y) points that we know the line passes through? This will allow us to solve for b for the particular line that passes through the two points you gave!

You can use either (x,y) point you want..the answer will be the same:

(-4,4). y=mx+b or 4=0 × -4+b, or solving for b: b=4-(0)(-4). b=4.

(6,4). y=mx+b or 4=0 × 6+b, or solving for b: b=4-(0)(6). b=4.

See! In both cases we got the same value for b. And this completes our problem.

m came out to be zero, so there is no "mx" term.

Answer:

undefined

Step-by-step explanation:

To find the slope through 2 points

m = ( y2-y1)/(x2-x1)

   = ( -4 - -3)/(3 - 3)

    = ( -4+3)/(3-3)

    = -1/0

Since it is a number divided by zero, the slope is undefined