adajiamcneal
  • adajiamcneal
Please Help
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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adajiamcneal
  • adajiamcneal
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adajiamcneal
  • adajiamcneal
i think its a but im not sure..
anonymous
  • anonymous
@adajiamcneal Your answer is well :)

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More answers

theopenstudyowl
  • theopenstudyowl
I think it's 10 but I am a bit unsure...
adajiamcneal
  • adajiamcneal
ok thank you :) i have a couple more ..
anonymous
  • anonymous
K let me know :)
adajiamcneal
  • adajiamcneal
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adajiamcneal
  • adajiamcneal
@Omar_Elboredy
anonymous
  • 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 :)
adajiamcneal
  • adajiamcneal
B ?
anonymous
  • anonymous
aha (y)
adajiamcneal
  • adajiamcneal
because 40/4 = 10 lol
anonymous
  • anonymous
:)
adajiamcneal
  • adajiamcneal
c?
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adajiamcneal
  • adajiamcneal
@Omar_Elboredy
anonymous
  • anonymous
1 cm = 10 ft. then 4.7 cm = ? By criss-cross : ? = 4.7 * 10 = 47 ft :) Which will be "D" :)
adajiamcneal
  • adajiamcneal
b? @Omar_Elboredy
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anonymous
  • 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
adajiamcneal
  • adajiamcneal
@Omar_Elboredy idk how to do this one.. i typed it in the calculator and i dont get any of the options.
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anonymous
  • anonymous
Could U plz show me wat U typed ! :D
adajiamcneal
  • adajiamcneal
lol i have a scientific calculator i typed in 7 and hit tan-1 haha
anonymous
  • anonymous
So wat U got out ?
adajiamcneal
  • adajiamcneal
0.122784561 lol
anonymous
  • 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 :)
adajiamcneal
  • adajiamcneal
it is in the degree mode and i still get the same thing
anonymous
  • anonymous
U hit tan(7) ! :D
anonymous
  • 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
adajiamcneal
  • adajiamcneal
ohhhhhhh its c lol i feel dumb -.-
anonymous
  • anonymous
:D
adajiamcneal
  • adajiamcneal
ok if i need more ill tagg you in a different question :) thank you
anonymous
  • anonymous
If U wanna pm me it's ok :)
adajiamcneal
  • adajiamcneal
@ayyookyndall
anonymous
  • anonymous
K let me see wat's next :D
adajiamcneal
  • adajiamcneal
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anonymous
  • 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
anonymous
  • 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" :)
adajiamcneal
  • adajiamcneal
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anonymous
  • 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 ? :)
adajiamcneal
  • adajiamcneal
D?
anonymous
  • 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
ayyookyndall
  • ayyookyndall
Its C, correct?
anonymous
  • anonymous
Yes :)
anonymous
  • 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 :)
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adajiamcneal
  • adajiamcneal
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anonymous
  • 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
anonymous
  • 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
adajiamcneal
  • adajiamcneal
D
anonymous
  • anonymous
What is the value of angle (x) ?
adajiamcneal
  • adajiamcneal
24.775
anonymous
  • anonymous
which is 25 ok :D Then by this we exclude D and B , now what is the direction ?
adajiamcneal
  • adajiamcneal
west south
adajiamcneal
  • adajiamcneal
oh so its a?
anonymous
  • anonymous
Exactly ! :D
adajiamcneal
  • adajiamcneal
ok im done :) kyndall might need help though so can you please help her ?
anonymous
  • anonymous
K no prob. feel free to ask me anytime :)

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