Need help. 45 -45 -90
X=
Y=

Answer:

36 non repeating, 72 repeating (AB=BA)

Step-by-step explanation:

There is a theoretical approach to solving this question. We have formulae for such types of question in ‘Permutation and Combination’ chapter but let me solve it through my approach.

There are 9 members in the unit.

we have to choose only 2 people out of them randomly.

let the members be A, B, C, D, E, F, G, H an, I

A can be chosen first with one of the rest as the second person.

Like AB, AC, AD, AE … AI ………………………(1)

by this, we can choose people in 8 ways.

we will also have 8 ways as BA, CA, DA, … IA ………..(2)

the series (2) is completely reverse of series (1)

now perform the same action taking B as first-person and people after B as the second person.

by this, we will have 7 ways

and 7 ways again in reverse mode.

The same process with C, D, E and other members

we get

8*2 = 16 ways with A

7*2 = 14 ways with B

6*2 = 12 ways with C

5*2 = 10 ways with D

4*2 = 8 ways with E

3*2 = 6 ways with F

2*2 = 4 ways with G

1*2 = 2 ways with H

and I can not be selected lonely because there is no person after I.

SO total ways = 16 + 14 +12 + 10 + 8 + 6 + 4 + 2 = 72 ways

72 will be the answer if the selection of A first and B second is different from the selection of B first and A second.

If AB = BA then the answer will be 72/2 = 36

(It is my approach and easier way for me than the traditional formulae)

Answer: 1/10

Step-by-step explanation:

At the end of the day, she still had 2/5 of the book to read. Which meant that she had read 3/5 of the book. Since she read 1/2 of the book in the day, we would read 3/5 - 1/2 = 6/10 - 5/10 = 1/10 of the book at night.

Answer:

the variable for it

Step-by-step explanation:

Answer:

H es una variable. ¡Marque como más inteligente! <3

Answer:

a) Given that w=81 and k = 0.375 then r = 6

b)  Given that s=27 and k = 224 then w=32

Step-by-step explanation:

Step(i):-

Given that W varies directly as r³

      ⇒ w∝r³

    ⇒   w = kr³

where 'k' is proportionally constant

given that w= 24 and r =4

     ⇒  24 = k (4)³

     ⇒ k = [tex]\frac{24}{64}[/tex]

    ⇒ k = 0.375

Step(ii):-

Given that W varies indirectly as 's'

            w ∝[tex]\frac{1}{s}[/tex]

            W =k [tex]\frac{1}{s}[/tex]

where 'k' is proportionally constant

          28 = k ([tex]\frac{1}{8}[/tex])

        k = 28 × 8 = 224

Step(iii):-

a) Given that w=81 and k = 0.375

     w = kr³

   81 = 0.375 (r)³

   r³ = 216

  r = ∛216 =6

 r =6

b)

 Given that s=27 and k = 224

          W =k [tex]\frac{1}{s}[/tex]

         w = 224 ([tex]\frac{1}{27}[/tex])

        w = 32

Answer:

1:3

Step-by-step explanation:

70:210

7:21

1:3

Answer:

The answer is 2 and 1/3

Ratio: 7 : 3

Fraction: 2⅓

Answer:

A) To make a decision on where to park depends on

B) Option 1 is most cost effective when the  parking time is ≥ 3hours

while Option 2 is most cost effective when the parking time is ≤ 30 minute

Step-by-step explanation:

A) To make a decision on where to park depends on

B)

lets assume you will be parked for 30 minutes before picking up your friend

For option 1

You will spend $5 and also get a free shuttle to the terminal

For option 2

You will spend $2  

Therefore Option 2 is better

Lets assume you will be parked for 3 hours  before pick up

For option 1

You will spend $5 and also get a free shuttle

For option 2

You will spend ; $2 for the first 30 minutes + $10 for the remaining 2hours 30 minutes

Therefore Option 1 is better.

Option 1 is most cost effective when the  parking time is ≥ 3hours

while Option 2 is most cost effective when the parking time is ≤ 30 minutes

Answer:

27 + 5[tex]\sqrt{2}[/tex] + ( -3[tex]\sqrt{10}[/tex] + 9[tex]\sqrt{5}[/tex] ) i

This 'i' is iota.

Hope this helps you. Do mark me brainlist

Answer:

x=2sec

H=144m

Step-by-step explanation:

Answer:

Step-by-step explanation:

A "greater than or equal to" sign means that your line will have a closed, or filled in circle. Knowing this, we can eliminate all of the open circle options.

If our numbers are negative, a number "greater than" a negative would be closer to or positive. I would choose the filled in circle pointing towards the right, given this information.

And for solving the inequality:

-3x (greater than or equal to) -18

/-3                                            /-3

x (less than or equal to 6)

Answer:

x=14 x 7=98

Step-by-step explanation:

Answer:

the answer is X=98

Step-by-step explanation:

Answer:

4.1 horas 246 min

4.7 horas 282 min

4.8 horas 288 min

4.9 horas 294 min

5 horas 300 min

Step-by-step explanation:

Answer:

Don't put it on the news because it's a high risk personnel?

Answer:

6

reduce the expression  and if possible do that by cancelling the common factors :)

Answer:

200 + 400 + 200

This is because you always round up past 50 and down under 50 so.

182->200

439->400

217->200

Answer:

Median is 18, because 18 is the middle number.

Step-by-step explanation:

Answer:

18

Step-by-step explanation:

I hope this helps and have a great day!

Step-by-step explanation:

[tex]( - 4 + 9) \times (1 - 8) \\ = 5 \times ( - 7) \\ = - 35[/tex]

hope it helps:)

Answer:

It's a scalene triangle

Step-by-step explanation:

Answer:

9

Step-by-step explanation:

Translating the word problem into a symbolic statement:  W = kr³/s.  Find k by letting W = 24, r = 4 and s = 8:

         k·4³

24 = --------            

           8

This reduces to 3 = 4^3*k, or 3 = 64k, or k = 3/64 (the constant of proportionality).

       3r^3

w = ---------

         64

Answer:

y=2x-14

Step-by-step explanation:

y=mx+b(m is slope)

we know

y=2x+b

so if you plug in the values for the points you get

-6=4(2)+b

-6=8+b

b=-14

so then the complete equation would be

y=2x-14

Answer:

i belive the answer is A

Step-by-step explanation:

Answer:

A

Step-by-step explanation:

mark me brainlist plz :)

Answer:

roses are red violets are blue I don't know the answer but ily

Step-by-step explanation:

So you use the distributive property

3*x and 3*-1

You get 3x and -3

so therefore 3x-3

Answer:

3x - 3

Step-by-step explanation:

3(x - 1)

Multiply the 3 to both the variable and the number in the parentheses.

Answer:

m=1067

Step-by-step explanation:

19 +.05m = 72.35

72.35-19 = 53.35

53.35/.05= 1067

m=1067

Answer:

2√3

Step-by-step explanation:

In a special right triangle called the 30-60-90 triangle, the ratios of the side lengths are x-x√3- 2x respectively. This means that the side opposite to the 60 degrees is x√3 and the side opposite to the 30 degrees is x.

Since the side opposite to the 60 degrees is 6, x√3=6

x√3=6

x=6/√3

rationalize the denominator:

6√3/3

simlify

2√3

so the answer is the third one. 2√3

Answer:

x = 12y + 1

y = Jenny's score

Answer:

Step-by-step explanation:

[tex]x^2-30x+225\\ \\ (x-15)^2, $ so the length of a side is 15ft. $ \\ \\ P=4x=4(15)=60, $so the perimeter is 60ft. $ [/tex]

Answer:

Given polynomial:

Side length is

Perimeter of the square: