Study Gang discussion

Math questions!

Any help with circle equations they are super confusing and I have two assignments almost due on them

do you mean-like- the different forms of equations of a circle?

I guess my teacher wants us to write circle equations

could you share an image or an example of the question?

or you could upload it to your google drive and right-click & copy image address & then paste the link within the html quotes < img src="" >

here's one of the questions I am doing it on IXL so its the only one I can currently access to

Write the equation in standard form for the circle with center
(–10,0) and radius √19.

Deborah wrote: "here's one of the questions I am doing it on IXL so its the only one I can currently access to

Write the equation in standard form for the circle with center
(–10,0) and radius √19."

I'm really sorry-I was afk...
So, see:
the general form of a circle (when center and radius are given) is:
(x-h)^2+(y-k)^2=r^2

(h,k) are the co-ordinates of the center and r is the radius

if you want to prove it, although:
we know that: circle is a locus of a moving point [say (x,y)] so that it's distance from a fixed point [say (h,k)] is always constant in a plane. The constant distance is called radius (r) of the circle. The distance between two points in a plane is,

so, just substitute the values and voila!

im actually so done with math rn.

omg i have a super important math test coming up😭

Sol wrote: "omg i have a super important math test coming up😭"

Good luck!

Guys, how do u square root 0.30625 and get 0.5534 ?? idk how to square root numbers using long div method when its a decimal idk im not getting it

the notes i have says "No.of arcs (in circle)= pi*r" idk how?, i was absent when it was taught, someone help pls

Dorcas wrote: "the notes i have says "No.of arcs (in circle)= pi*r" idk how?, i was absent when it was taught, someone help pls"

im confused cause normally, the number of arcs in a circle isn't expressed in terms of 𝜋⋅𝑟 but rather in terms of the number of degrees or radians subtended by each arc.soo idk maybe its a mistake?

hm maybe

bella ♡ ♡ (semi-hiatus) wrote: "im actually so done with math rn."

real my math teacher can't teach

ᴘʜɪᴅᴇʟɪᴀ wrote: "so, just substitute the values and voila!"

woww so smart (im not joking)

hey guys does anyone have any good videos or youtubers I can watch to understand surface area and volume? I don't understand anything my teacher says so this would be really appriecated.

Dorcas wrote: "the notes i have says "No.of arcs (in circle)= pi*r" idk how?, i was absent when it was taught, someone help pls"

how do you even define number of arcs in a circle!??!? I thought there were infinite

ᴘʜɪᴅᴇʟɪᴀ wrote: "Dorcas wrote: "the notes i have says "No.of arcs (in circle)= pi*r" idk how?, i was absent when it was taught, someone help pls"

how do you even define number of arcs in a circle!??!? I thought th..."

ik!! thats what i thought and thats why i was confused

can someone solve and show me the steps to find square root of 0.30625 using long div method? the answer is meant to be 0.553 and im not able to get it

ples im stuck

Dorcas wrote: "can someone solve and show me the steps to find square root of 0.30625 using long div method? the answer is meant to be 0.553 and im not able to get it"

I have a tip for an easier way-
0.30625= 30625/100000 right?
so, it's easier now: sqrt (30625)=175 and sqrt(100000)= 100*sqrt10
Divide them by each other and you get it.

ᖰϦɨᖱ៩ɭɨ♬ wrote: "Dorcas wrote: "can someone solve and show me the steps to find square root of 0.30625 using long div method? the answer is meant to be 0.553 and im not able to get it"

I have a tip for an easier w..."

OMGGGG!!! THATS GENIUS!! thanks a lot <33 :D

for angles bigger than 360, how do u know which quadrant it lies in?

Dorcas wrote: "ᖰϦɨᖱ៩ɭɨ♬ wrote: "Dorcas wrote: "can someone solve and show me the steps to find square root of 0.30625 using long div method? the answer is meant to be 0.553 and im not able to get it"

I have a ti..."

no prob!

Dorcas wrote: "for angles bigger than 360, how do u know which quadrant it lies in?"
Sorry I missed this message:

convert it into in multiples of pi or 2npi(=360) + θ
then, use the unit circle to get ordinary quadrant angles:
A simpler way: if it's a multiple of 2npi or pi, you can easily remove it and just use θ part.

eg: sin (1485 °) = sin(1440 °+45 °)=sin(4π + π/4)=sin(π/4)= 1/√2



https://i.sstatic.net/lHkVu.png

OR
you can also watch this video - it explains the concept quite well I think:
https://www.youtube.com/watch?v=8Z60_...

bella ♡ ♡ (semi-hiatus) wrote: "im actually so done with math rn."
real I have a maths test coming up

uhhh, this looks so harddd. monday i have a big test at math (geometry) and i am parallel with what is going onnn. i think for you in easy bc I am only in 7 gradee.

Even I thought Algebra was hard when I first started it , but eventually I started enjoying it <3

guys calculus is killing me rn

sanchita 𓆩♡𓆪 wrote: "guys calculus is killing me rn"

eh those good ol' days of bathing(read:drowning) in the realm of calculus was quite something
good luck!

Hii
You guys helpppp plsss
I have this problem over here in math 100:

Which is worth more at 6 percent, compounded annually: $2,000 in hand today or $3,000 due in 2 years?

I'm not sure which formula I should use pls I need helpp😭😭

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