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Korvikt [17]
3 years ago
11

How many ways can 4 people sit in a row of 7 ​chairs?

Mathematics
2 answers:
mafiozo [28]3 years ago
7 0
Four people can sit in a row of seven in three ways
Ghella [55]3 years ago
6 0

7\cdot6\cdot5\cdot4=840

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Find all the square roots of x^2 ≡ 53 (mod 77) by hand. This is my second post. Please explain all the steps how you did this?
sasho [114]

Answer:

Step-by-step explanation:

Given that

x^2 ≡ 53 (mod 77)

Right side has values as

53, 53+77, 53+2(77),+....

We have to find one which is a perfect square.

We have from this series 361 is 19 square

Thus x =19.

Next is x^2=900\\x=30

x^2=2209\\x=47 and so on.

3 0
3 years ago
Determine the equation of the tangent line to the given path at the specified value of t. (sin(7t), cos(7t), 2t9/2); t=1
Reptile [31]

Answer:

P(t) = {sin7, cos7, 2} + (7cos7, -7sin7, 9)(t-1)

Step-by-step explanation:

The equation of the tangent line to the given path at the specified value of t is expressed as;

P(t) = f(t0) + f'(t0)(t - t0)

f(t0) = (sin(7t), cos(7t), 2t^9/2)

at t0 = 1;

f(t0) = {sin7(1), cos7(1), 2(1)^9/2}

f(t0) = {sin7, cos7, 2}

f'(t0) = (7cos7t, -7sin7t, 9/2{2t^9/2-1}

f'(t0) = (7cos7t, -7sin7t, 9t^7/2}

If t0 = 1

f'(1) = (7cos7(1), -7sin7(1), 9(1)^7/2)

f'(1) =(7cos7, -7sin7, 9)

Substituting the given function into the tangent equation will give:

P(t) = f(t0) + f'(t0)(t - t0)

P(t)= {sin7, cos7, 2} + (7cos7, -7sin7, 9)(t-1)

The final expression gives the equation of the tangent line to the path.

4 0
3 years ago
Five more than three times a number is twenty-six.
Rzqust [24]

Answer:

Step-by-step explanation:

I DON`T KNOW THE ANSWER

5 0
3 years ago
8. There are approximately 2.2046 kilograms in 1 pound. There are about 0.4536 pounds in 1 kilogram. To convert 112 lxs to kilog
Zanzabum

Answer:

Step-by-step explanation:

first of all the question is wrong 1 kilogram = 2.2046 pounds. and 1 pound = 0.4536kilogram.

if we want to convert 112lb into kilogram. we multiply it by 0.4536.

ie 112lb = 112x0.4536kg = 50.8032kg

to convert lb to kg you do this; lb x 0.4536

to convert kg to lb you do this; kg x 2.2046

7 0
3 years ago
Please help me with this math question
Neko [114]

Answer:

C .56

Step-by-step explanation:

well thier are 5 days that are less then 3 days and theirs 9 days in total so you would do 5/9  to get the chance of it being less then 3 days.

5/6 = .555556

3 0
4 years ago
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