#Double check my answers

130 messages · Page 1 of 1 (latest)

rain verge
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Currently on two, but will do three after this, I will leave this post up as I'm going through my review rn.

Capital letters are angle values, lowercase letters are side lengths

topic is about sin law and cos law

Tell me if you need a bigger image

image.png image.png image.png image.png
tacit pelicanBOT
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rain verge
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A) is sine law, b) is cos law, and c) is cos law but for angles

ruby stone
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first one is correct

rain verge
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what about the others?

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I also got question 3 ready as well

ruby stone
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why am I getting 16.38 for b)

rain verge
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round up

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sorry forgot to round up

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16.38 is correct

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iirc 16.377 something is the actual decimal

ruby stone
ruby stone
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c) looks wrong I’m ngl

rain verge
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For c, rounds up to a whole number

ruby stone
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if only because x should be the biggest angle in that triangle

ruby stone
rain verge
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Diagram doesn't matter, formula does

ruby stone
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and 17 is the largest side in that triangle so x has to be the largest

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good way to intuitively check your answers sometimes

rain verge
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but I need to see if it's actually wrong

ruby stone
ruby stone
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?

rain verge
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how does c = 17?

image.png image.png
ruby stone
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because your formula does cos(x) = (x^2 + b^2 - c^2)/(2xb)

ruby stone
rain verge
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canada

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lemme guess US writes it like this:

ruby stone
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I don’t know how the fuck the US writes it and tbh I don’t care

ruby stone
rain verge
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(c^2-a^2-b^2)/-2ab

ruby stone
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(if you wanted x to be the opposite side feel free to use cos(x) = (b^2 + c^2 - x^2)/(2bc))

rain verge
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oh wait

ruby stone
rain verge
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I see it now

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I see it now

ruby stone
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uhh lmk what you get as an answer

rain verge
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My dumbass wrote a^2+b^2-c^2

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I rounded and got 98 degrees

ruby stone
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I did not get 98 degrees :/

rain verge
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wait

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why the fuck am I so dumb

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104 degrees?

ruby stone
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yeah

rain verge
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Yeah my dumbass DID NOT READ THE END of the formula💀

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Atleast I now know something new 😄

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I'm so fucking cooked for the test

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The more I find ways to check my answers, the less mistakes I make, I think?

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anyways what about the third one

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oh wait

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I'm still fuckiong dumb

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we were just doing the third one

ruby stone
rain verge
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Istg special ed class ain't accepting me😭

ruby stone
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…

rain verge
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anyways moving on question 3 with the parabolas

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the equations that I got is

first is y= 3(x-2)^2-4

second is y= -1/2(x-2)^2+5

I hope I ain't blind as shit

ruby stone
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first one looks good

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second one you’re definitely missing something

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ok second one is almost correct

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hint: parabola is going down

rain verge
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1/2 needs to be negative

ruby stone
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yep

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everything else seems fine

rain verge
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let me pull up the forth question

ruby stone
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seems legit

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think they’re all right

rain verge
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k ima do question 5 and 6 brb

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oh I'm fked, just looked at it, welp lemme attempt it

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I have a question

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So here is one of my questions that I gotta solve, x^2 -6x +7 = 0, could the Ax part be considered as 1?

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idk how to explain this well

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Ax^2 + Bx+ C = 0 is our formula

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and I got to use quadratic formula to solve for my x-intercepts

ruby stone
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A = 1 yeah

rain verge
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I remember my teacher saying that I gotta factor something if it's avaliable after simplifying the radical within the quadratic formula, for example I got 6 [+-] 2[sq. root (2)]

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do I simplify it to 2(3[+-] 1 [sq. root (2)])

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originally was

image.png
ruby stone
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huh

rain verge
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hol up let me get visibility on the image

ruby stone
# rain verge

yeah you can cancel top and bottom to get 3 +- sqrt(2)

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the 1 is unnecessary

rain verge
ruby stone
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checks out

rain verge
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second question

ruby stone
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looks good

rain verge
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Wait does it still cancel even if I have 4 and -4?

ruby stone
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you get an extra - sign left over

rain verge
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so it should be -1 [+-] 4?

ruby stone
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also you can start by dividing the equation by -2 to get
h^2 + 2h - 15 = 0
instead of -2h^2 - 4h + 30

ruby stone
rain verge
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so x1 = 3 and x2 = -5

ruby stone
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ye

rain verge
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btw question 6, a to f says solve using most appropriate method

ruby stone
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what’s question 6

rain verge
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we done a

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sending b

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I should also probably try one that is factoring

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I got 3x^2 +21x-30 = 0

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oh wait I don't think I can factor this one as I would be left over with 3(x^2+7-10)

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2 + 5 = 7 but 2*5 doesn't = -10

ruby stone
rain verge
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Man I am tired

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Studying with 5 hours of sleep is not ideal

ruby stone
rain verge
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6e, I don't really got a clue on how to do this one

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welp uhhh I think this post is gonna be inactive

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close

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close+

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forgot what it is

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+close

leaden lanternBOT
# rain verge +close
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leaden lanternBOT
# leaden lantern

Thank you for your feedback! Ellen B has been awarded 1 helper_points. They now have 14 helper_points. They have 2 helper_points daily left for today.