3 years ago

Please answer thisHope you get alongI report What to answer

1 answer:

3 0

What the hel you expect us to do all that for 5 kids points? Go ask you mom to do that for you. If you're asking US to do that, then it has to be 40 or 50 points.

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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

3 years ago

Which histogram represents a data set with a mean of 4.5 and a standard deviation of 1.7?

AVprozaik [17]

Answer:

that would be the third one

Step-by-step explanation:

5 0

3 years ago

Help me please this is a quiz for today

Alexandra [31]

Slope is 5
Y intersect is 0

Y= 5x

3 0

3 years ago

How do i solve this problem

mamaluj [8]

As they are similar corresponding sides are in the same ratio, so

18/15 = x / 4

x = 4*18 / 15
x = 4.8 answer

7 0

3 years ago

Can someone help me solve this math problem please?

SCORPION-xisa [38]

2x-1=0
2x=1
x=1/2

x+5=0
x=-5

Final answer: B

7 0

3 years ago

Please answer thisHope you get alongI report What to answer​

Please answer thisHope you get alongI report What to answer