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Schach [20]
3 years ago
6

What is the answer to this question

Mathematics
1 answer:
Elis [28]3 years ago
5 0

Answer:

x=-6

Step-by-step explanation:

(3/1*1/3)=1

-2*3=-6

x=-6

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find the angle between vectors a =(1,2) and b = (1,-1/2). Brainliest for correct answer. Look at photo.
rosijanka [135]

Answer:

  90°

Step-by-step explanation:

The angle between the vectors can be found any of several ways. Here, we observe that the segments from the origin to the two points are at right angles to each other. (Their slopes are opposite reciprocals.) Hence the angle between the vectors is 90°.

__

The slope to point 'a' is y/x = 2/1 = 2.

The slope to point 'b' is y/x = (-1/2)/1 = -1/2.

The product of these slopes is (2)(-1/2) = -1, indicating the vectors are perpendicular. The angle between them is 90°.

__

We can also use the trig formula for the tangent of the difference of angles.

  tan(α-β) = (tan(α) -tan(β))/(1 +tan(α)tan(β))

The tangents are the slopes, calculated above, so we have ...

  tan(α -β) = (2 -(-1/2))/(1 +(2)(-1/2)) = (5/2)/0 = <em>undefined</em>

The tangent is <em>undefined</em> for angles that are odd multiples of 90°. The angle between the vectors is 90°.

8 0
2 years ago
Given the points K(-2;5), L(1,3) and M(-5; 2p). Calculate the value
Advocard [28]

The product of the perpendicular lines is a negative one. Then the value of p will be negative 3.75.

<h3>What is coordinate geometry?</h3>

Coordinate geometry is the study of geometry using the points in space. Using this, it is possible to find the distance between the points, the dividing line is m:n ratio, finding the mid-point of the line, etc.

Given the points K(-2,5), L(1,3) and M(-5, 2p).

If KL is perpendicular to LM. Then we have

The slope of KL will be

KL = (1+2)/(3-5)

KL = -1.5

The slope of LM will be

LM = (1+6)/(3-2p)

LM = 7/(3-2p)

We know the product of the perpendicular lines is a negative one.

        KL x ML = -1

-1.5 x 7/(3-2p) = -1

              -10.5 = -3 + 2p

                 2p = -7.5

                   p = -3.75

More about the coordinate geometry link is given below.

brainly.com/question/1601567

#SPJ1

4 0
2 years ago
Find the area of a regular polygon with 100 sides with a perimeter of 100 units
Gnom [1K]
<span>The area of any regular polygon with n sides of length s is


s = 100/100 = 1

Area =~ 795.55 sq units</span>
4 0
3 years ago
JERMEY had 36 community concerts to sell he sold 2/3 of the tickets how many tickets did he sell
Vladimir79 [104]

9514 1404 393

Answer:

  24

Step-by-step explanation:

Jermey sold 2/3 of 36 = ...

  (2/3)×36 = (2×36)/3 = 2×(36/3) = 2×12 = 24

Jermey sold 24 tickets.

3 0
3 years ago
Which is a way to use prime factorization to find the least common multiple (LCM) of 9 and 12?
ohaa [14]

Answer:

36

Step-by-step explanation:

5 0
3 years ago
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