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Nadusha1986 [10]
3 years ago
9

Please help me with this. I'm stuck

Mathematics
2 answers:
Anon25 [30]3 years ago
8 0

Answer:

Step-by-step explanation:

7 choose 2    or    

=7! / (7-2)!

=7*6*5*4*3*2*1  /  5*4*3*2*1

=7*6

=42

MatroZZZ [7]3 years ago
5 0

Answer:

It is 42!

Step-by-step explanation:

Your welcome! :)

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5. given the vector [-5,12], find each of the following vectors. a. same direction, twice as long. b. same direction, length 1 (
pshichka [43]

The vectors are listed below:

  1. <u>v</u> = [- 10 / 13, 24 / 13]
  2. <u>v</u> = [- 5 / 13, 12 / 13]
  3. <u>v</u> = [50 / 13, - 120 / 13]

<h3>How to derive the expressions of vectors</h3>

Vectors are characterized by magnitude and direction. The magnitude is a scalar and the direction by a ordered pair, whose formula is shown below:

<u>v</u> = k · <u>u</u>    

Where <u>u</u> is a unit vector, that is, a vector of length 1.

Now we proceed to determine each vector:

a) The equation of the vector:

r = √[(- 5)² + 12²]

r = 13

k = 2

<u>v</u> = (2 / 13) · [- 5, 12]

<u>v</u> = [- 10 / 13, 24 / 13]

b) The equation of the vector:

<u>v</u> = (1 / 13) · [- 5, 12]

<u>v</u> = [- 5 / 13, 12 / 13]

c) The equation of the vector:

<u>v</u> = (- 10 / 13) · [- 5, 12]

<u>v</u> = [50 / 13, - 120 / 13]

To learn more on vectors: brainly.com/question/4579006

#SPJ1

5 0
2 years ago
Yoshi saved $5 each week for 23 weeks. What is the total amount of money he saved. Use an area model to solve
faust18 [17]
You would have $115 for those 23 weeks you’ve saved!
4 0
4 years ago
Read 2 more answers
Kinda confused on this one
Stels [109]
Oposite interior angle are equal with paraelelle ilnes
and also oposite angles in intersecting lines are equal so
and striahgt lines are 180 degrees

so
∠1=∠2=∠6=∠4=∠3


∠1=∠3
∠1=108
∠3=108

answer is 108 degrees
3 0
3 years ago
I need help please.
IgorC [24]
The answer a I believe so.
8 0
3 years ago
The polynomial p(x)=3x^3-20x^2+37x-20 has a known factor of (x-4). Rewrite p(x) as a product of linear factors. p(x) =
vesna_86 [32]

Answer:

p(x) = (3x^{2} - 8x + 5)(x - 4)

Step-by-step explanation:

p(x) has degree 3

(x - 4) has degree 1

So p(x) can be rewritten as a polynomial of degree 2 multiplying (x-4)

So

p(x) = (ax^{2} + bx + c)(x - 4)

To find a, b and c, we have to divide p(x) by x - 4.

So

Finding a:

Dividing the first term of p(x) by x - 4.

\frac{3x^{3}}{x - 4} = 3x^{2}

So a = 3.

Now multiplying 3x² by, x - 4, we have:

3x^{2}(x - 4) = 3x^{3} - 12x^{2}

Subtracting p(x) from this:

3x^{3} - 20x^{2} + 37x - 20 - (3x^{3} - 12x^{2}) = 3x^{3} - 20x^{2} + 37x - 20 - 3x^{3} + 12x^{2} = -8x^{2} + 37x - 20

Finding b:

Dividing the first term, after the subtraction, by x - 4.

\frac{-8x^{2}}{x - 4} = -8x

So b = -8.

Multiplying -8x by x - 4, we have:

-8x(x-4) = -8x^{2} + 32x

Then

-8x^{2} + 37x - 20 - (-8x^{2} + 32x) = -8x^{2} + 37x - 20 + 8x^{2} - 32x = 5x - 20

Finding c:

\frac{5x}{x - 4} = 5

So c = 5.

Just to verify if the remainder is 0.

5(x - 4) = 5x - 20

5x - 20 - (5x - 20) = 0

Ok

Then:

p(x) = (ax^{2} + bx + c)(x - 4)

p(x) = (3x^{2} - 8x + 5)(x - 4)

7 0
3 years ago
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