Question

http://img862.imageshack.us/i/page596.jpg/
I need help # 37,38

Answer 1

Which one do you want to tackle first?

Answer 2

37 first

Answer 3

Ok, what do you know about the length of AD?

Answer 4

the answer is d, How I can find the length?

Answer 5

What can you tell me about the length of AD by looking at the picture?

Answer 6

the question is what the measure of AD?

Answer 7

Yes I know. I'm asking what you think about the problem

Answer 8

can you see the picture?

Answer 9

This is math. Some thinking is required ;)

Answer 10

Yes I can see it. I'm asking what does it tell you? I know what it's telling me.

Answer 11

yes it math

Answer 12

given the lenghth AB, BC, CD, I don't get what you asking

Answer 13

I wonder do you know how to get answer find length AD

Answer 14

I know how to get the answer yes. I want to know what you know? That way I can see how to help you.

Answer 15

Nobody cares if I can do it.

Answer 16

I don't know

Answer 17

if given radius is may easy for my to do

Answer 18

I been thinking many hours but I can't solve

Answer 19

if you can help me ,

Answer 20

Good! You know how to solve it with the radius?

Answer 21

yes, I can do if I know radius or given tangents or secants

Answer 22

Ok, well for this we don't actually need the radius. This is called a tangential quadrilateral. It has the property that the two opposite sides will add to the same length.

Answer 23

what side?

Answer 24

AB + CD = AD + BC

Answer 25

great, thank

Answer 26

What do you think about 38?

Answer 27

let me think

Answer 28

I think H

Answer 29

Why?

Answer 30

w is the weight the total weight have to be less or equal

Answer 31

r no more than 12

Answer 32

r no more than 12 comes from what statement?

Answer 33

If I tell you, there are 4 reams of paper in the box, what is the weight w?

Answer 34

the given r is the box can carry no more than 12 reams of paper

Answer 35

right.

Answer 36

so my r is less than 12 it's 4, what is w?

Answer 37

4.4

Answer 38

if the box itself weighs 1.3 and each ream weighs 4.4 and there are 4 reams, what is the total weight?

Answer 39

total; 18.9 w

Answer 40

You sure the weight isn't 1 ?

Answer 41

22.8w

Answer 42

I think 18.9 was correct actually.

Answer 43

But wait, why isn't the weight just 3.1 or 1.3 or 10

Answer 44

Aren't all those < 1.3 + 4.4r ?

Answer 45

w<1.3 +4.4r, r<12

Answer 46

Right. So if I tell you that r=1, what is the weight? It's 1.1111111111111 right?

Answer 47

because

1.111111 < 1.3 + 4.4

Answer 48

r=1?
w<5.7

Answer 49

Sure, and 1.1111 is less than 5.7, so 1.1111 is the weight? But 0.1274 is also less than 5.7, so which one is the weight?

Answer 50

Or is the weight both 1.1111 and 0.1274 or maybe the weight is \(\pi\). I do like \(\pi\).

(Here is where you tell me I'm being dumb and the weight is 5.7)

Answer 51

\(\pi\) is less than 5.7 so I think \(\pi\) is the weight. Cause you said anything less than 1.3 + 4.4r was a solution for the weight of a box.

Answer 52

and I said there was 1 ream, so the box can weigh anything less than 5.7

Answer 53

And you say "No dummy the box weighs 5.7"

Answer 54

;)

Answer 55

ok, thank you so much

Answer 56

Wait. What? Did you find the solution?

Answer 57

yes I think
w<1.3 + 4.4 r , r<12

Answer 58

no.. that's what I'm trying to explain

Answer 59

Once we pick an r, we know exactly how much the box weighs. The restriction is on r not on the weight.

Answer 60

w is not any number less than 1.3 + 4.4r. If I tell you r =1, w is not any number less than 5.7. It is 5.7

Answer 61

the key not reqite r

Answer 62

hrm? I didn't follow that. The answer is G.

Answer 63

If we have r, we know exactly what w is. Not that it's less than something, we know exactly. The only restriction we have is that r must be less than or equal to 12. But will be exactly 1.3 + 4.4r for any r you pick that is allowed.

Answer 64

err w will be exactly 1.3 + 4.4r

Answer 65

Ok , you said w = 1.3+4.4r ,r<12

Answer 66

yes. Because once you pick how many reams in the box, the box has an exact wieght.

Answer 67

if you pick 1 ream goes in the box, the box will wiegh 5.7. It will not weigh 1.1 or 0.213. If w < 5.7 were the definition then w could be any of those.

Answer 68

OK, it help

Answer 69

I understand now

Answer 70

thank you

Answer 71

no problem

Answer 72

It late I go to the bed now bye