Can someone please help me with this problem, I do not understand how to solve

- waheguru

Can someone please help me with this problem, I do not understand how to solve

- Stacey Warren - Expert brainly.com

Hey! We 've verified this expert answer for you, click below to unlock the details :)

At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus. Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.

- chestercat

I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!

- waheguru

##### 1 Attachment

- waheguru

How do i solve this?

- anonymous

Let the part of it that's being invested at a rate of 5% per annum be x. Let he other part that's being invested at 7.2% "5000-x".

Looking for something else?

Not the answer you are looking for? Search for more explanations.

## More answers

- waheguru

can it not also be y ?

- anonymous

Why would you want two variables when you can solve it using one? Do you want to make your life harder?

- waheguru

Its because i am learning graphing at the moment so i thought there would be y in there

- anonymous

Does the question have the word sketch/draw or graphically in it?

- waheguru

no

- anonymous

Then what kind of reason was that?... Now let's continue on with the question rather than giving random excuses as to what you're learning.

- waheguru

sorry

- anonymous

Write 5% as a decimal.

- anonymous

Also write 7.2% as a decimal.

- waheguru

0.05

- waheguru

0.072

- anonymous

Sorry I meant fraction. My apologies.

- waheguru

50/1000 75/1000

- anonymous

Make it into the simplest form please. If you don't know how to simplify fractions into its simplest form, then I suggest you use your calculator.

- waheguru

1/20 and 3/40

- anonymous

75?

- anonymous

The question says 7.2%....not 7.5%....

- waheguru

9/125

- anonymous

You only got one correct. Please rewrite 7.2% as a fraction again please.

- anonymous

Yep you're correct.

- anonymous

Sorry about that, my comp lagged out.

- anonymous

Okay now. Do you agree that (x times 5%)+[(5000-x) times 7.2%)]=349?

- waheguru

yes

- anonymous

Okay, now change the 5% and 7.2% into the fractions you wrote previously and show me your equation.

- waheguru

1/20 x + 9/25 (5000-x) = 349

- anonymous

Yep great! Excellent.

- anonymous

Now. You just figured the equation that would lead you to finding x. \[\frac{ x }{ 20 }+\frac{ 9(5000-x) }{ 125 }=349\]

- waheguru

oh... yea

- anonymous

It's 125.

- anonymous

I'm just letting you go for just writing 25 but I will let you go this time due to the probability of that being a typo.

- waheguru

yea

- anonymous

Okay, so when you get rid of the fractions by multiplying both sides with the Lowest common multiple, tell me what you get.

- waheguru

500 LCD

- anonymous

yep.

- anonymous

Multiply by 500 to both sides.

- anonymous

Tell me what you get. Afterwards, you would have to expand/distribute the brackets/paranthesis.

- waheguru

Ill do that, but just for knowledge this can also be answered by using the decimals (0.05 and 0.075) right

- waheguru

i ment 0.072

- anonymous

Yea of course.

- anonymous

I just reckon fractions are clearer and you would understand a bit better.

- anonymous

So what did you get?

- waheguru

I find fractions a bit difficult so i did decimals, 0.05x + 0.072(5000-x) = 349

- waheguru

0.05x + 360-0.072x = 349

- anonymous

Okay...Well then expand/distribute the brackets/paranthesis...

- waheguru

and 0.05x - 0.072 = -11

- anonymous

Where's the x gone mate?

- waheguru

sry (you are am amazing teacher you can catch the slighest mistakes =) 0.05x - 0.072x = -11

- anonymous

Okay collect likes terms. That means group the x's together.

- anonymous

like terms*

- waheguru

-0.022x = -11

- waheguru

x= -11/-0.022

- waheguru

x = 500

- waheguru

wow

- anonymous

Yep and then what do you get for the other one.

- anonymous

?*

- anonymous

There's two parts.

- anonymous

That's the first part where it was invested at a rate of 5% p.a

- anonymous

So what about the part where it was invested at a rate of 7.2%?

- waheguru

4500 the rest of the money

- anonymous

Correct. Awesome.

- waheguru

wow, you are just an amazing teacher. thank you soo much

- anonymous

I will show what I did using fractions. This just give you a look at a different perspective in solving these. \[25x+36(5000-x)=174500\] \[25x+180000-36x=174500\] \[11x=180000-174500\] \[11x=5500\] \[x=500\]

- anonymous

And no worries. Good work.

- waheguru

Mr, Aztech are you usually available at this time so I can ask you for help

- anonymous

Not all the time. I'm also busy with my own work. So some days I will be off doing my work and other days I will be resting and so on. This is only just a bit of fun to help others with their homework.

- waheguru

Thankyou sir

Looking for something else?

Not the answer you are looking for? Search for more explanations.