Posted by **zana** on Thursday, October 13, 2011 at 7:13pm.

$100,000 is divided into two investments with annual returns of 4% and 7.5%. find the amount invested at the lower rate if the total income at the end of the year is $5050?

- pre-calculus -
**Reiny**, Thursday, October 13, 2011 at 7:18pm
amount invested at 4% --- x

amount invested at 7.5% -- 100000-x

solve for x:

.04x + .075(100000-x) = 5050

- pre-calculus -
**betty **, Thursday, October 13, 2011 at 10:16pm
solve for x and express the solution in a+bi form : ix^2-3x+4i=0

- pre-calculus -
**Steve**, Friday, October 14, 2011 at 11:03am
You sure this is right?

ix^2 - 3x - 4i = (ix+1)(x-4i)

but that's not what we have.

So, using the good old quadratic formula,

x = (3 ± √5)]/2i

## Answer This Question

## Related Questions

- pre-calculus - $100,000 is divided into two investments with annual returns of 4...
- Algebra - A person invested $7000 for 1 year, part at 5%, part at 10%, and the ...
- Algebra - A person invested $7000 for 1 year, part at 5%, part at 10%, and the ...
- lim - I'm completely drawing a blank on how to do this. A woman has $500,000 ...
- college algebra - I'm completely drawing a blank on how to do this. A woman has...
- algebra - two investments were made totaling $15,000. for a certain year these ...
- maths - an amount of Rs 5000 is put into three/investments at the rate of ...
- accounting - Mr. and Mrs. Garcia have a total of $ 100,000 to be invested in ...
- math - Two investments earn a total annual income of $2825. One investment is in...
- Algebra - You invested $1 0,000 on two stocks paying 8% and 10% annual interest...

More Related Questions