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babymother [125]
2 years ago
10

Can any Math Expert help me with this hard TOPIC vectors

Mathematics
2 answers:
sladkih [1.3K]2 years ago
8 0

Answer:

See below.

Step-by-step explanation:

OB = OA + AB

AB = OB - OA

=  4x + 8y - (2x + 9y)

= 2x - y

CD = 4x - 2y

= 2(2x - y)

Therefore  the vector CD has the same direction as AB (its the same line on the coordinate plane) but  has  twice the magnitude of AB. That is its represented by a line  twice as long.).

pychu [463]2 years ago
6 0

According to the calculations the line CD Is twice the line AB

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I need this asap ty:p
Anastasy [175]

Answer:

(a) x = -2y

(c) 3x - 2y = 0

Step-by-step explanation:

You can tell if an equation is a direct variation equation if it can be written in the format y = kx.

Note that there is no addition and subtraction in this equation.

Let's put these equations in the form y = kx.

(a) x = -2y

  • y = x/-2 → y = -1/2x
  • This is equivalent to multiplying x by -1/2, so this is an example of direct variation.

(b) x + 2y = 12

  • 2y = 12 - x
  • y = 6 - 1/2x
  • This is not in the form y = kx since we are adding 6 to -1/2x. Therefore, this is <u>NOT</u> an example of direct variation.

(c) 3x - 2y = 0

  • -2y = -3x
  • y = 3/2x
  • This follows the format of y = kx, so it is an example of direct variation.

(d) 5x² + y = 0

  • y = -5x²
  • This is not in the form of y = kx, so it is <u>NOT</u> an example of direct variation.

(e) y = 0.3x + 1.6

  • 1.6 is being added to 0.3x, so it is <u>NOT</u> an example of direct variation.

(f) y - 2 = x

  • y = x + 2
  • 2 is being added to x, so it is <u>NOT</u> an example of direct variation.

The following equations are examples of direct variation:

  • x = -2y
  • 3x - 2y = 0
7 0
2 years ago
Read 2 more answers
Each cube in this rectangular prism is 1 cm3.What is the volume of the rectangular prism?
Lelechka [254]

Answer:

Volume of rectangular prism = 20\ cm^3

Step-by-step explanation:

Given rectangular prism is made up of small cubes of volume 1 cubic centimeter.

To find volume of rectangular prism.

Solution:

Volume of rectangular prism is = length\times width \times height

We know that all sides of a cube are equal in measure.

So, we will count the number of cubes on each side to get the exact measure.

Length side = 4 cubes = 5 cm

Width side = 2 cubes = 2 cm

Height side = 2 cubes = 2 cm

Thus volume of rectangular prism =  5\ cm\times 2\ cm \times 2\ cm

Volume of rectangular prism = 20\ cm^3

4 0
3 years ago
Suppose f"(x) = -9 sin(3x) and f'(0) = -4, and f(0) = -2<br> Find f(pi/4)
grigory [225]

Answer:

9sin (3)and f,(0)=4,AND f(0)=2

5 0
3 years ago
HELP! Look at the stem-and-leaf plot. What is the mode of the numbers?
puteri [66]
The answer is 100
since the number 100 is the number that appears to be the most frequent
7 0
2 years ago
Please help!! I will make you brainlest.
Law Incorporation [45]

Answer:

5) x = 12 6) y = 3.5

Step-by-step explanation:

For number 6 that one may be right I tried several ways and kept getting that answer

5. is completely write though

Hope that helps

3 0
3 years ago
Read 2 more answers
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