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i think its a but im not sure..

3. anonymous

4. theopenstudyowl

I think it's 10 but I am a bit unsure...

ok thank you :) i have a couple more ..

6. anonymous

K let me know :)

@Omar_Elboredy

9. anonymous

So let's take it easily and step-by-step , you have 2 polygons of the same shape and U want to compare them ... Then the easy step is to use ratio! $\frac{ 12 }{ 40 } = \frac{ 3 }{ x }$ Then nw you have to get x in one side and othe stuff on the other side like that $\frac{ x }{ 3 } = \frac{ 40 }{ 12 }$ Multiplying both sides by 3 : $x = \frac{ 40 }{ 4 } = ?$ Let me know if you got it :)

B ?

11. anonymous

aha (y)

because 40/4 = 10 lol

13. anonymous

:)

c?

@Omar_Elboredy

16. anonymous

1 cm = 10 ft. then 4.7 cm = ? By criss-cross : ? = 4.7 * 10 = 47 ft :) Which will be "D" :)

b? @Omar_Elboredy

18. anonymous

To find length of hypotenuse use Pythagorean theorem . Applying this to given prob. you will get : $\sqrt{17^2 + 17^2} = 17\sqrt{2}$ Which will be C

@Omar_Elboredy idk how to do this one.. i typed it in the calculator and i dont get any of the options.

20. anonymous

Could U plz show me wat U typed ! :D

lol i have a scientific calculator i typed in 7 and hit tan-1 haha

22. anonymous

So wat U got out ?

0.122784561 lol

24. anonymous

O.o See. .. First be sure that you are in the deg. mode and then type in sth like this : $\tan^{-1} 7$ and then hit equal sign then let me know wat U get :)

it is in the degree mode and i still get the same thing

26. anonymous

U hit tan(7) ! :D

27. anonymous

U have to hit this : shift button then tan button u will get tan-1 shown on the screen :D then type 7 and show me wat U get

ohhhhhhh its c lol i feel dumb -.-

29. anonymous

:D

ok if i need more ill tagg you in a different question :) thank you

31. anonymous

If U wanna pm me it's ok :)

@ayyookyndall

33. anonymous

K let me see wat's next :D

35. anonymous

mmmmm I couldn't figure out what's wrong with that question .. I think it's 40 cm^2 but the answer is not shown ! :D

36. anonymous

Aha I got the trick :D You have to calculate the missing portion of the base which will be 8 & $\frac{ 4 }{ \sin(45) } = 4\sqrt{2}$ Then apply the rule you will get sth near "C" :)

38. anonymous

For reflection about the y-axis you have think about it like you a mirror on the y-axis which means that the y-coordinates for each point will be the same the only change will be with the sign of x-coordinates for each point So wat will be the answer ? :)

D?

40. anonymous

By this you changed the sign of both x-coordinates and y-coordinates ... And we only want to change the sign of x's

41. ayyookyndall

Its C, correct?

42. anonymous

Yes :)

43. anonymous

Take this as a rule : If you wanna reflect about x-axis just change the sign of y-coordinates only If you wanna reflect about y-axis just change the sign of x-coordinates only If you wanna reflect about the origin just think you do this in two steps .. one about x-axis and the other is about the y-axis :)

45. anonymous

This includes two separate types of data : Angle and length(magnitude) The angle is calculated like this : you know from trig rules that SOH CAH TOA >> $\sin(x) = \frac{ Opposite }{ Hypotenuse } , \cos(x) = \frac{ Adjacent }{ Hypotenuse } , \tan(x) = \frac{ Opposite }{ Adjacent }$ Then you nw have wat for x ? Opposite which is -12 and Adjacent which is - 26 , then use which rule ? We use tan , the this will be sth like this : $\tan(x) = \frac{ -12 }{ -26 }$ and to get x we have to do tan-1 ! :D then x will bet : $x = \tan^{-1} (\frac{ -12 }{ -26 } = 24.775$ which is nearly 25 deg the nw for the direction : its west south (y) Now wat ? :D It's magnitude

46. anonymous

So let's calculate magnitude , as you know this is a right-angled triangle , so to get the length of hypotenuse we use the Pythagorean theory which is : $a^2 = b^2 + c^2$ we here have b and c |dw:1432965278834:dw| so to get a we apply the rule and we simply get $a^2 = 820$ to get a we take the square root for both sides in which we will get $a = 29$ so the answer will be ? Let me know wat you figured out :D

D

48. anonymous

What is the value of angle (x) ?

24.775

50. anonymous

which is 25 ok :D Then by this we exclude D and B , now what is the direction ?

west south

oh so its a?

53. anonymous

Exactly ! :D

ok im done :) kyndall might need help though so can you please help her ?

55. anonymous

K no prob. feel free to ask me anytime :)