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3 years ago

HELP FOR BRAINLESS !!!!

Mathematics

2 answers:

garik1379 [7]3 years ago

8 0

Answer:

the blue one

Step-by-step explanation:

Kruka [31]3 years ago

5 0

Answer:

Step-by-step explanation:

its the first one

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Find the angle between vector u=2i+sqrt(11)j and v=-3i-2j to the nearest degree

const2013 [10]

Answer: Last option 155°

Step-by-step explanation:

We have the components of the vectors u and v.

Then, to find the angle between them, perform the following steps:

1) Calculate the scalar product u * v

If $u = 2i + \sqrt{11}j$ and $v = -3i-2j$

Then, the product scalar u * v is:

$u * v = (2)(-3) + (\sqrt{11})(-2)$

$u * v = -6-2\sqrt{11}$

$u * v = -12.633$

2) Calculation of the magnitude of both vectors.

$| u | = \sqrt{(2) ^ 2 + (\sqrt{11})^2}\\\\| u | = \sqrt{4+11}\\\\| u | = \sqrt{15}$

$| v | = \sqrt{(- 3) ^ 2 + (- 2) ^ 2}\\\\| v | = \sqrt{9 +4}\\\\| v | = \sqrt{13}$

3) Now that you know the product point between the two vectors and the magnitude of each, then use the following formula to find an angle

$u * v = | u || v |cos(\alpha)$

$-12.633 = \sqrt{15}\sqrt{13}*cos(\alpha)\\\\cos(\alpha) = \frac{-12.633}{\sqrt{15}\sqrt{13}}\\\\arcos(\frac{-12.633}{\sqrt{15}\sqrt{13}}) = \alpha\\\\\alpha =155\°$

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4 years ago

Evaluate 13⋅13....<br> We are working on exponents X3 <br> Please answer ^^<br>

andrey2020 [161]

Answer:

13*13= 169

Step-by-step explanation:

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4 years ago

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Felicia invested $25,000 into an account earning 3% interest compounded annually. She makes no other deposits into the account a

rewona [7]

The formula is
A=p (1+r)^t
A future value?
P present value 25000
R interest rate 0.03
T time 9 years
A=25,000×(1+0.03)^(9)
A=32,619.33

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4 years ago

Find four consecutive multiples of<br> 5 with a sum of 210.

olganol [36]

It’s 42 heheeeee I’m Michel Jackson

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3 years ago

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On Monday, Rachel bought company stock for $39.60 per share. On Tuesday, the share price changed by -$2.35. On Wednesday, the sh

NemiM [27]

Answer: i belive that it is 38.70

Step-by-step explanation: 39.6 - 2.35 + 1.45 = 38.70

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3 years ago