(3.85 x 103) - (1.4 x 102) In scientific notation I need ASAP plss Ill give points

Prove 3(x+1)(x+7)-(2x+5)² is never positive

Ede4ka [16]

Hope that's correct ✍︎︎

7 0

3 years ago

A vector u has a magnitude of 15 and a direction of 0 degrees. A vector v has a magnitude of 9 and a direction of 35 degrees. Fi

umka2103 [35]

Answer:

$\displaystyle \alpha \simeq 13^o$

$\displaystyle \left | \vec{u}+\bar{v} \right |\simeq 23$

Step-by-step explanation:

Sum Of Vectors

Given

$\displaystyle \vec{u}=, \vec{v}=$

the sum of both is

$\displaystyle \vec{u}+\vec{u}=$

Given a vector

$\displaystyle \vec{x}=$

The magnitude of \vec x is

$\displaystyle \left | \vec{x} \right |=\sqrt{m^2+n^2}$

And the angle is forms with the positive x-axis is

$\displaystyle tan\alpha =\frac{n}{m}$

We have

$\displaystyle \vec{u}=$

Also

$\displaystyle \vec{v}=$

$\displaystyle \vec{v}=< 7.372,5.162>$

The sum of both vectors is

$\displaystyle \vec{u}+\vec{v}=$

The magnitude of the sum is

$\displaystyle \left | \vec{u}+\vec{v} \right |=\sqrt{22.732^2+5.162^2}=22.96$

We compute the angle (direction)

$\displaystyle tan\alpha =\frac{5.162}{22.732}=0.227$

$\displaystyle \alpha =12.79^o$

Rounding to the nearest integer

$\displaystyle \alpha \simeq 13^o$

Rounding the magnitude

$\displaystyle \left | \vec{u}+\bar{v} \right |\simeq 23$

5 0

3 years ago

What is the simplified form of expression ? 5(14 - 2) to the 2nd power over 2

ser-zykov [4K]

5(14−2)^2/2
=5(12^2)/2=
(5)(144)/2
=720/2=
360

4 0

3 years ago

Read 2 more answers

73,529-9,199 = ? whats the awnser?

loris [4]

64,330 is your answer. Hope this helps! :)

5 0

3 years ago

Read 2 more answers

Where would the shape be located after a rotation of 90 degrees clockwise about the origin?

Lilit [14]

Answer:

It should be the first quadrant

Hope that helps!

5 0

3 years ago