Question

PLEASE help!!! Geometry question- I really need to submit my assignment and I have no idea how to do these...

Answer 1

1 complete rotation means 360

Answer 2

20 secs it takes 1 full rotation
so 4 secs it makes?

Answer 3

4 = 20/5
so 4 = 1/5 th of a full rotation

Answer 4

72?

Answer 5

And what about the 2nd one?

Answer 6

@jim_thompson5910

Answer 7

if it takes 20 seconds to make a full revolution, then how far have you gone in 5 seconds?

Answer 8

72 degrees?

Answer 9

1/2 a revolution? 3/4 of a revolution? 1/4 of a revolution?

Answer 10

I'm confused..

Answer 11

5 seconds/20 seconds = ???

Answer 12

ohhh 1/4

Answer 13

so you've gone 1/4 of a full 360 degree revolution

Answer 14

(1/4)*360 = 90 degrees

Answer 15

so you've rotated 90 degrees CCW

Answer 16

the rule for that is

(x,y) ----> (-y,x)

Answer 17

so (-3,4) ?

Answer 18

yep

Answer 19

and then was 72 right for the first one?

Answer 20

yes

Answer 21

thank you! And could you also help me with these? Someone tried explaining them to me earlier but I couldn't get it...

Answer 22

you posted the same thing twice

Answer 23

idk you posted #2 twice, so some info is missing

Answer 24

oh, i left out the first one. 1 sec

Answer 25

how do you go from point T do line DC?

Answer 26

to*

Answer 27

move to the right two and up one i think

Answer 28

yep, so the vector is <2,1>

Answer 29

<p,q> means you move p units on the x and q units on the y

Answer 30

p positive ---> move to the right
p negative ---> move to the left

etc etc

Answer 31

same question, just going from from where we stopped earlier to point H

Answer 32

4, -2?

Answer 33

yep go 4 to the right, 2 down

Answer 34

these aren't too bad right?

Answer 35

right. :) So it would be <4, -2> ?

Answer 36

yep

Answer 37

And then for the last one it would be <6, -1> ?

Answer 38

vectors are like directions to move from point to point

ie they're like translations

Answer 39

yep, if you add the vectors, you are essentially going from point A to C (instead of going from A to B, then to C)

Answer 40

so you are taking the direct route from beginning to end (without the pitstop)

Answer 41

thanks! Could you double check these 2 for me?

Answer 42

what a mess....not sure where things should line up

Answer 43

What do you mean?:o

Answer 44

I don't think it's 180 though

Answer 45

it looks more like 30 or 45, not sure though

Answer 46

it's very hard to see the pic and where things should line up

Answer 47

I think I'm just gonna go with 45, haha. But how do I figure out the 2nd one if I'm using 45?:o

Answer 48

if it was 45, then,

24/360 = x/45

1/15 = x/45

1*45 = 15x

15x = 45

x = 45/15

x = 3

So it was open 3 hours

Answer 49

Ohh okay. Thank you!

Answer 50

np