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aivan3 [116]
3 years ago
8

I need help with my homework

Mathematics
1 answer:
Vesna [10]3 years ago
7 0

2x tablespoons i believe

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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}

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3 years ago
1. The expression x3+3x2+x-5 represents the total length across the front of the mansion. Find the length of side I. Show all wo
Lubov Fominskaja [6]
Given that t<span>he expression x^3+3x^2+x-5 represents the total length across the front of the mansion. Let the length of side I be a, then

x^4-2x^3+x-10+a-x^3+5x^2+2=x^3+3x^2+x-5 \\  \\ \Rightarrow a=x^3+3x^2+x-5-x^4+2x^3-x+10+x^3-5x^2-2 \\  \\ =\bold{-x^4+4x^3-2x^2+3}</span>
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Gibson had 3,020 in his savings. He bought 8 DVD players that costs $99 each, tax inclued.after this purchase, how much money di
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$2228 left in his savings.
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What is 7.5% as a fraction
fomenos

Answer:

15/2

Step-by-step explanation:

hope it helps (•‿•)

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2 years ago
PLEASE HELP! WILL MARK BRAINLIEST!!
Andru [333]

Answer:

c

Step-by-step explanation:

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