Posted by **jasmine20** on Sunday, February 11, 2007 at 10:21pm.

Can someone help me put this into equations where i can solve them thanks.

Problem #1

Allen bought 20 stamps at the post office in 37cents and 20cents denominations. If the total cost of the stamps was $7.06, how many 37cents stamps did Allen buy?

Problem #2

An 800g solution of acid and water contains 128g of acid. What percent of the solution is acid?

Problem#3

A principle of $5000 was invested in a savings account for 4years. If the interest earned for the period was $400, what was the interest rate per year?

Problem#4

Enrique puts 12% of his monthly paycheck in an IRA. If he invests $72 in his IRA, how much was his paycheck?

1) I can't figure this one out

2) 128 is what percent of 800? Now write that in math terms (is means equals, of means multiply):

128=x(800)

Remember to multiply by 100 at the end because the decimal needs to be in percent form.

3) Principle = Rate x Time

5000=r(4)

4) $72 is 12% of what? The what is the paycheck amount:

72=(0.12)(x)

belinda, thank you for helping me out

now for # 2

what i got was 16 is that correct so then it would just be 16%

#3

how can be 5000=r(4) where does the 400 goes?

#4

i get a crazy number with decimals. i get 14.46

## Answer This Question

## Related Questions

- Algebra - Can someone please help with this? Allen bought 20 stamps at the post ...
- algebra - Allen bought 20 stamps at the post office in 37 cents and 20 cents. ...
- Math (Please Help) - A man went to a post office to buy stamps. He bought x, 50 ...
- math - in a series of stamps annie must buy six of each one cost $4.00 one cost...
- Math !-_- - Please help me out. Omg...i absolutley hate math. I try my best but...
- algebra - An executive bought 300 stamps for $73.80. The purchase included 15 ...
- Maths - Hi I have a maths problem I can't figure out please someone help. Zac ...
- intermediate algebra - A business executive bought 40 stamps for $13.68. The ...
- Math - Janessa bought 4 stamps for $1.84. At this,rate how much would 10 stamps ...
- math - suppose you bought some 32 cent stamps and some 20 cent stamps. you spent...

More Related Questions