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yanalaym [24]
2 years ago
8

Question in pic! Will give brainliest! ANSWER ASAP

Mathematics
1 answer:
ICE Princess25 [194]2 years ago
8 0

Answer:

52

Step-by-step explanation:

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I need help with this problem
Arada [10]

Answer:

65.56°

Step-by-step explanation:

We know that if we take dot product of two vectors then it is equal to the product of magnitudes of the vectors and cosine of the angle between them

That is let p and q be any two vectors and A be the angle between them

So, p·q=|p|*|q|*cosA

⇒cosA=\frac{u.v}{|u||v|}

Given u=-8i-3j and v=-8i+8j

|u|=\sqrt{(-8)^{2}+ (-3)^{2}} =8.544

|v|=\sqrt{(-8)^{2}+ (8)^{2}} =11.3137

let A be angle before u and v

therefore, cosA=\frac{u.v}{|u||v|}=\frac{(-8)*(-8)+(-3)*(8)}{8.544*11.3137} =\frac{40}{96.664}

⇒A=arccos(\frac{40}{96.664} )=arccos(0.4138 )=65.56

Therefore angle between u and v is 65.56°

5 0
2 years ago
Why is the decimal in 125.6 there how did it get there?
irakobra [83]

Answer:

I’m not sure. If your joking or.

4 0
2 years ago
Chris wants to order DVDs over the internet.
Nuetrik [128]

Step-by-step explanation:

14d +9 <100

14d represents cost for dvds. 9 is the flat rate shipping. all must be less than 100

6 0
3 years ago
Read 2 more answers
Pls help me with number 6 and 7 choose 2 answers for number 6 and 3 for 7 !! ILL MARK BRAINLIST !!
bulgar [2K]
6 is 4.9 and 6.2 but i’m not sure about 7 tho
5 0
3 years ago
Read 2 more answers
Consider the following pair of equations:
Aloiza [94]
Y = 3x + 3 this is equation 1
y = x -1 this is equation 2
since equation 1 and 2 already defined y in terms of x, we're just gonna substitute y into the other equation. as 2 is shorter I'm going with that today
x - 1 = 3x +3
-1 - 3 = 3x - x
-4 = 2x
x = -2
now we've got x just sub it in equation 2
y = -2 -1
y = -3
so the answer is (-2,-3)

5 0
2 years ago
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