um

[full cove]

is the sum of 2 speeds i think

wait i messed up brb ill give explanation

the relative speed is 20m/s.

because it is

the speed of

6 meters

over 0.3s

and relative speed is the sum of 2 diff speeds

we already have one

so it is 20m/s = 18m/s + x

x = 2m/s

[warm patrol]

Or, from here:
u = x/t - v = 6 m/((3/10) s) - 18 m/s = 2 m/s

[full cove]

now this

should be easy

[brittle lichen]

10

i think

[full cove]

did u do it or ur teacher told u

[brittle lichen]

second

😒

[full cove]

😭

[brittle lichen]

but i think i heard her wrong

is it 9 or 10 idk

[full cove]

bro

isnt this an arithmetic series

or smt

[warm patrol]

Hm...
So, we have an integer sequence x(k), k = 1, ..., 10, such that:

1. S(10) = 150.
2. Δx(k) is a positive integer for all k.
3. x(10) ≤ 2x(1).

[warm patrol]

Not necessarily.

The differences aren't constant.

[full cove]

cant we use this

[warm patrol]

Again, this isn't an arithmetic progression.

The average spendings per day are 150/10 = 15 dollars.

[full cove]

no cap over here 7th grade we didnt even know what ≤ meant

[warm patrol]

Uh, what?

[full cove]

💀

[warm patrol]

Well, maybe you have a different grade system...

[full cove]

ok maybe not that bad

[warm patrol]

In Russia physics starts in 7th grade, so not knowing what ≤ would be a significant problem.

[full cove]

we didnt know what integer meant

[warm patrol]

That is even worse...

[full cove]

XDD

but

the system is rlly

hard

smh

it flips from 8th / 9th

[brittle lichen]

showing this to grade 7

ouuch

[warm patrol]

Well, I don't know.

[full cove]

mb its unrelated

[brittle lichen]

i learned physics at grade 5 or 6 i forgot

[full cove]

ye here they did like basic geometry and uh

statistics

stuff like that

derrrick spent 11$ on the first day

[warm patrol]

Wait, statistics?

Where did that come from?

[full cove]

wym

[warm patrol]

Well, we're talking about school subjects.

Statistics isn't a school subject.

It comes in the second year of university.

[brittle lichen]

physics isnt a subject here inmy cuntry

its a

strands of science

[warm patrol]

You mean there's a subject that's just called "science"?

[full cove]

it happens

i think its biology

phys and chem

in 1

or smt

well here theres that in hs and its biological engineering or smt

[warm patrol]

Hm. Well, alright.

Still not sure why you mentioned statistics, though.

[full cove]

no i meant

here in7th grade

we did that

and stuff like that

[warm patrol]

Statistics? In school?

[full cove]

uh

[warm patrol]

Let alone in 7th grade?

[full cove]

ye?

[warm patrol]

Huh...

That sounds pretty absurd.

[full cove]

nah

[warm patrol]

Statistics requires calculus, linear algebra and probability theory - all university subjects.

[full cove]

💀

thats at the higher lvl

statistics follows u

since 7th grade

till 13th

[warm patrol]

Huh.

I don't see how you can learn anything from statistics in school, honestly...

I guess you might have some small knowledge of probability theory at that point, but certainly not calculus or linear algebra.

[full cove]

ye its legit pure basics

[warm patrol]

Even pure basics require all that, though...

What do you even learn there?

I just genuinely don't see how it's possible to learn statistics in any normal way in school.

It's like learning quantum mechanics in 6th grade.

[full cove]

lmfao

[full cove]

i found 15$

on the 7th day

[burnt dagger]

testing

[brittle lichen]

is 17$

first day = $y
y, y +1, y + 2, y + 3, .... y + 9
Total = < 150
y + y + 1 + y + 2 + ... + y + 9 < 150
10y + 45 < 150
10y < 105
y = 10.5

y + 9 < 2y
9 < 2y-y
9 < y
y > 9

y = 9 or 10

(9+10+11+12+13+14+15+16+17+18) + 15 = 135 +15 = 150
(10+11+12+13+14+15+16+17+18+19) = 145 + 5 = 150
make this becomes
10 + 11 + 12 + 13 + 14 + (16+1) + (17+1) + (18+1) + (19+1) = 145 + 5 = 150

[full cove]

Who gave u this

[brittle lichen]

u h

t

e

ac

h

er

🫠

[full cove]

I had 17 as an answer but i scrapped iy

It

[brittle lichen]

counting from ascending order (left to right), 17 is the 7th number aka 7th day

[full cove]

Lemme tell u

[brittle lichen]

7th day = 17$

[full cove]

This is 11th grade to 12th grade maths

[brittle lichen]

o:

koooool

i think my doubts

r

cleared

i guess

😒

theres more questions

that idk

but

idk

[full cove]

Send

[brittle lichen]

its all algebras il send later

[brittle lichen]

r you ready to do mind blowing questions

[inner yacht]

that is n² + (n+1)² + ...

as sequence

[full cove]

Sorry i didnt see these look easier ill help u tmr

[brittle lichen]

easier? 😭 I'll punch a bag

[full cove]

hi

imma start on these

[full cove]

annnd i forgot to do them

😭

[burnt dagger]

they're still really easy tho

[full cove]

@brittle lichen

Theres a lot of answers to this

Can u ask ur teacher which one u need to find

Or if u cropped it send me the instruction

[brittle lichen]

its

4 x 4 2022 times

and

9 x 9 2024 times

bt

no way im doing that

take sforever

[full cove]

Theres a trick lol

Use algebra laws

Think abt it

[brittle lichen]

whats that

[full cove]

Idk what its called

U saod them b4

[brittle lichen]

oh

oh

[full cove]

Use this

[brittle lichen]

the

formulas?

[full cove]

a^x * b^x = (ab)^x

Ye the formulas

[brittle lichen]

oh

but

the

power thingy isnt same

[full cove]

U can turn

9^2024

To 2022

Times smt

[brittle lichen]

oh

oh

im lazy to do them rn

so

🏃‍♀️