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polet [3.4K]
2 years ago
7

PLZ HELP!!!

Mathematics
1 answer:
Fed [463]2 years ago
4 0
4 is missing I assume. But I could be wrong
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How do you add vectors? Add the vector 3,4 to the vector that goes 7 units at an angle of 2π/3.
Gekata [30.6K]

The sum of two vectors is (- 0.5, 10.1)

<u>Explanation: </u>

To add two vectors, add the corresponding components.

Let u =⟨u1,u2⟩ and v =⟨v1,v2⟩ be two vectors.

Then, the sum of u and v is the vector

u +v =⟨u1+v1, u2+v2⟩

(b)

Two vectors = ( 3, 4 )

angle 2π/3 = 120°

In x axis, the vector is = 7 cos 120°

                           = 7 X -\frac{1}{2} \\\\= -3.5

In y axis, the vector is = 7 sin 120°

                                  = 7 X 0.866

                                  = 6.062

The second vectors are ( -3.5, 6.062)

Sum of two vectors = [( 3 + (-3.5) ), (4 + 6.062)]

                              = (- 0.5, 10.1)

6 0
3 years ago
Pleaze Help! Due in 15 min!!!! Will give Brainliest to first correct answer to show steps!
Grace [21]
Your answer is5x^4 * sqrt 3x
4 0
2 years ago
Round the numbers to the nearest tenth, then find the sum:<br> 3.296 + 0.9785.
Debora [2.8K]

Answer:

4.3

Step-by-step explanation:

first round

3.296 is 3.3

0.9785 is 1

3.3 + 1 = 4.3

4 0
2 years ago
Write 0.0004571 in scientific notation.
NISA [10]
Scientific notation means to write the answer in standard form. standard form helps you to express numbers that are too big or too small to be conveniently written in decimal form.
so for this case, it will be 4.571×10^-4.
when the number is decimal, you move the dot to the right and it will always be multiplying 10 to the power of a negative power.
6 0
3 years ago
Read 2 more answers
U and v are position vectors with terminal points at (-1, 5) and (2, 7), respectively. Find the terminal point of -2u + v.
Papessa [141]

Answer:

  (4, -3)

Step-by-step explanation:

-2u +v = -2(-1, 5) +(2, 7) = (-2(-1)+2, -2(5)+7)

  = (4, -3)

4 0
2 years ago
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