Hey can someone help me with my homework, it due tmrw and its on compound interest, I really underst

[fast wedge]

Hey can someone help me with my homework, it due tmrw and its on compound interest, I really dont get this topic so i would appreciate it.

[lavish tinsel]

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[fast wedge]

@stoic arrow

[stoic arrow]

Post the question

[fast wedge]

There are 5 questions

But thats the first one.

[fast wedge]

^

[stoic arrow]

Set up an equation with the principal as the unknown. (x*1.025 - 1000)*1.025 = 23517.6

[fast wedge]

I'm confused what will be the answer?

[stoic arrow]

x will be the answer. Solve for x

[fast wedge]

I don't know how to do that, sorry.

[stoic arrow]

Look at the operations needed to “isolate x”. First, divide both sides by 1.025 to isolate the expression in parentheses. Next, add 1000 to both sides. Finally, divide both sides by 1.025, and you will have a value for x

[fast wedge]

Im only 14 and im really confused

Please could you tell me the answer?

[stoic arrow]

I could, but that won’t help you at all. Let’s take it step by step (and maybe try closing fortnite for the moment)

We want the equation to be in the form x = (some value). But we have all these other things attached to x, which we want to get rid of

[fast wedge]

It's been in the background. I have not been playing.

[fast wedge]

Okay

[stoic arrow]

The first thing to get rid of is the factor of 1.025. So, we divide both sides by that. What do you get?

[fast wedge]

What are botth sides?

[stoic arrow]

(x*1.025 - 1000)*1.025 = 23517.6

The left and right sides of =

[fast wedge]

uh

[stoic arrow]

“Left” refers to the expression (x*1.025 -1000)* 1.025

“Right” refers to 23517.6

[fast wedge]

ok

right = 22944

i don't know how to do left.

[stoic arrow]

The left side is much easier. Because we’ve divided by 1.025, we can just remove that factor.

[fast wedge]

ok

(x*-1000)

[stoic arrow]

But not the factor inside the parentheses. We only removed the one on the outside

[fast wedge]

im so confused 😭

please may i have the answers then you teach me because i will get a detention

[stoic arrow]

But it’s due tomorrow. Out of curiosity have you taken pre algebra, algebra 1?

[fast wedge]

No

I live in the uk

And I am 14

So idk the system

[stoic arrow]

What have you learned?

[fast wedge]

If you could tell me the answer and then explain how to find it i would be really happy

[fast wedge]

compound interest this term.

Please please please @stoic arrow please give me the answers.

[stoic arrow]

I mean what is your background. What classes have you taken

[fast wedge]

for gcses i picked

history

triple science

[stoic arrow]

In math

[fast wedge]

you dont choose

u do everything

in the uk

[fast wedge]

Please

[stoic arrow]

We’re like halfway to the answer lol

[fast wedge]

i have 5 more questions to do

please give me the answers and then explain it

so it guarantess i dont get detention

please

Im begging of you @stoic arrow

[stoic arrow]

Well we have 1.025x - 1000 = 22944. Now, subtract 1000 “from both sides”, just like how we divided before

[fast wedge]

1.025x = 21944

[stoic arrow]

Now, can you figure out the last step?

[fast wedge]

1.025 x 21944?

[stoic arrow]

Not sure what that means. But, we should divide “both sides” once again by 1.025. What’s 21944/1.025?

[fast wedge]

21408.78049

[stoic arrow]

Round that to 2 decimal places, and that’s Carol’s original investment.

[fast wedge]

21408.78

?

[stoic arrow]

Yep. Now the hard part of these problems, which I did for this one, is setting up the equation in the first place

[fast wedge]

it says its wrong

[stoic arrow]

My bad. We should have added 1000 to both sides

So, we get 1.025x = 23944

[fast wedge]

mhm?

[stoic arrow]

x=23360

[fast wedge]

ty

ty very much!

How do you know what equation to set up?

NEXT QUESTION!

[stoic arrow]

If some amount x increases by 5% every year, how do you represent the increase over, say, k years?

[fast wedge]

k = 5?

k+5?

[stoic arrow]

No, you need the expression x(1.05^k)

[fast wedge]

how did u get that

[stoic arrow]

Are you familiar with exponents at least?

[fast wedge]

nope

[stoic arrow]

Ah. I fear I don’t have time to teach you everything you need…I recommend going through some of the pre-algebra/middle school material on khan academy to prepare you for doing algebra

[fast wedge]

Okat.

But how do i do the question

Or if you can give answer i dont mind

[stoic arrow]

12000(0.97^2)(1.07^3)

[fast wedge]

so what would the answer be.

[stoic arrow]

Do u not have a calculator?

[fast wedge]

I do

I didnt know you could put this in a calculator "^"

What is that

[stoic arrow]

13831.72, round to 13832

^ denotes exponentiation

Just like how multiplication is repeated addition, exponentiation is repeated multiplication

[fast wedge]

ty

im making account for kahn

whats the answer for this one

Also what math courses should i pick?

[stoic arrow]

I have to go now, but try to apply what you (hopefully) learned from the first 2 problems

[fast wedge]

Please answer the question before u leave

and what courses should i pick

[stoic arrow]

I think there’s a placement test maybe? When you’re done with hw, take that to figure out your courses in khan academy

There should be courses before that. I’m not sure you’re ready for pre algebra if you are completely unfamiliar with something like exponents and division

[stoic arrow]

Ask someone else, I have to go

[fast wedge]

ok

@haughty depot

Please can you help.

[haughty depot]

Why are you pinging me?

[fast wedge]

Im sorry I was just really desperate for help.

Could you help me?

[delicate juniper]

0.97*12000=a

0.97*a=b

1.07*b=c

1.07*c=current price

@fast wedge

it is percentage next time be a bit more smart on a thing this stupid and listen in class and understand, more importantly, don't do it the night before

[fast wedge]

Okay thank you.

How would i get the last one?

@delicate juniper

[open gulch]

@fast wedge has given 1 rep to @delicate juniper

[delicate juniper]

you do 1.02*2007 then 2007 value**1.02 etc till 2018

[normal portal]

How do I get people to look at the post created. This person made their post later than mine and has like 200 posts

Furrhermore the math they need help with is grade levels harder than mine

[delicate juniper]

you don't live of that hope shit

you wish the water was cold

the mf instructors keep on fucking running

because when the ending is unknown, and the distance is unknown, that's when you know who tf you are

stay hard

[fast wedge]

So what would be the answer

?

[delicate juniper]

well you do it

lol

30000*1.02

the result time 1.02

etc

[fast wedge]

im confused

[delicate juniper]

but you can modelize is by a reccuring sequence

[fast wedge]

what do i do to work it out

?

[delicate juniper]

go to numworks.com

emulateur/emulator

go to "suite"

write

U0=30000

Un+1=1.02Un

and look at year 18-6=12

look at U12

after doing what I said

here is your value

[fast wedge]

where does it say suite?

[normal portal]

Are angle bisectors difficult

[fast wedge]

where say suite

[delicate juniper]

sequences

ok the site is in english

because I am french and mine is french

[delicate juniper]

sequences

and do what I said

[fast wedge]

ok

could you tell me the answer because this caulculotr is confusing me

@delicate juniper

[delicate juniper]

I can't

youll have to figure this out, I am up to answering you still

[fast wedge]

please its my last question and i have to go bed in 1 minuete

@delicate juniper

[delicate juniper]

38000 is the answer

the exact one is 38047.25 pounds

[fast wedge]

it says its wrong

@delicate juniper

[delicate juniper]

oh you meant that question

I gave you first answer lol

[fast wedge]

oh

[delicate juniper]

answer on this one is absolute value of (A-B)/A*100

so it is 95000-80000

divided by 80000

and it is 0.1875

so 18.75 percents

@fast wedge

[fast wedge]

its wrong apparently

[delicate juniper]

oh yeah, i gave total increase

not yearly

[fast wedge]

so what would yearly be

@delicate juniper

?

[fast wedge]

what would yearly be

[delicate juniper]

i don't know