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2 years ago

Need help???!!!!!!!!!!!!!!!

Mathematics

2 answers:

solong [7]2 years ago

5 0

Answer:

Step-by-step explanation:

because it makes sense

In-s [12.5K]2 years ago

4 0

It’s e bae :) sorry im late!! Good luck

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The nine ring wraiths want to fly from barad-dur to rivendell. rivendell is directly north of barad-dur. the dark tower reports

Verdich [7]

Velocity of the ring wraiths relative to the air:

$\vec v_{W/A}=(v_{W/A}\cos45^\circ,v_{W/A}\sin45^\circ)=\left(\dfrac{v_{W/A}}{\sqrt2},\dfrac{v_{W/A}}{\sqrt2}\right)$

The speed $v_{W/A}$ is what we want to find - this is the speed at which the wraiths are flying in the air.

(Note: $\vec v$ denotes velocity, while $v$ denotes speed)

Velocity of air relative to the ground:

$\vec v_{A/G}=((69\,\mathrm{mph})\cos180^\circ,(69\,\mathrm{mph})\sin180^\circ)=(-69,0)\,\mathrm{mph}$

The ring wraiths want their trajectory to be due north, which means their velocity relative to the ground should be

$\vec v_{W/G}=(v_{W/G}\cos90^\circ,v_{W/G}\sin90^\circ)=(0,v_{W/G})$

To an observer on the ground, $v_{W/G}$ is the speed at which the wraiths would appear to be moving in the air.

The relative velocities satisify

$\vec v_{W/A}+\vec v_{A/G}=\vec v_{W/G}$

$\implies\begin{cases}\dfrac{v_{W/A}}{\sqrt2}-(69\,\mathrm{mph})=0\\\\\dfrac{v_{W/A}}{\sqrt2}=v_{W/G}\end{cases}$

$\implies v_{W/A}=69\sqrt2\,\mathrm{mph}\approx98\,\mathrm{mph}$

5 0

2 years ago

Can I get some help a good amount of points

RideAnS [48]

Answer:

about 180

Step-by-step explanation:

6 0

2 years ago

Read 2 more answers

-5x -10 >30 help Hehehehehe.

Mnenie [13.5K]

Answer:

x<-8

Step-by-step explanation:

-5x-10>30

(add 10 to both sides)

-5x-10+10>30+10

-5x>40

$\frac{-5x}{-1}$ < $\frac{40}{-1}$

(dividing through by -1 changes the sign of the inequality from "<" to ">")

5x<-40

(dividing through by 5)

$\frac{5x}{5}$ < $\frac{-40}{5\\}$

x<-8

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2 years ago

Which ratio is less than<br>7/15<br>o

Gemiola [76]

2/5=6/15 and that is less than 7/15

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2 years ago

How many times do 14 go into 50

masha68 [24]

=3 times it goes into

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