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3 years ago

Choose the name of this figure.

Mathematics

1 answer:

Brut [27]3 years ago

3 0

Answer:

we dont see aa figure

Step-by-step explanation:

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Let a=<-4,-3,5> Find a unit vector in the same direction as having positive first coordinate.

Rashid [163]

Answer:

The value is $u = < \frac{2\sqrt{2}}{10} , \frac{3\sqrt{2}}{10} , - \frac{\sqrt{2}}{2}>$

Step-by-step explanation:

From the question we are told that

The vector is a=<-4,-3,5>

Generally the unit vector is $u = ay$

Here y represent the y-coordinate

$u =y$

=> $u =$

Generally the resultant of a unit vector is 1

$|u| = \sqrt{ (-4y)^2 + (-3y)^2 + (5y)^2} = 1$

Hence

$|u| = \sqrt{ 16y^2 + 9y^2 + 25y^2} = 1$

Taking the square of both sides

$16y^2 + 9y^2 + 25y^2 = 1$

=> $50y^2 = 1$

=> $y = \pm \frac{1}{\sqrt{50}}$

=> $y = \pm \frac{1}{5 \sqrt{2}}$

Rationalizing

=> $y = \pm \frac{\sqrt{2}}{10}$

Given that the first coordinate is positive

$y = - \frac{\sqrt{2}}{10}$

Hence the unit vector is

$u =$

=> $u = < \frac{2\sqrt{2}}{10} , \frac{3\sqrt{2}}{10} , - \frac{\sqrt{2}}{2}>$

4 0

3 years ago

Solve the equation 5/7 (x-9)=25

Stells [14]

Answer:

X=44

Step-by-step explanation:

8 0

3 years ago

Find the area of the figure.

mash [69]

Answer:

I think its 38 however i could be wrong

Step-by-step explanation:

Self explanatory i just added them

**Put as brainliest if you wish**

5 0

3 years ago

Read 2 more answers

Determine what number is 30% of 400.

Darya [45]

Answer:

120

Step-by-step explanation:

Is means equals and of means multiply

W = 30% * 400

Change to decimal

W = .30*400

W = 120

6 0

3 years ago

Read 2 more answers

I swear. I’m just lazy. LOL XD

Anna11 [10]

The answer is A
Med range = 65+15 /2 = 40
Range = 65-15=50

5 0

3 years ago