Tuesday
July 22, 2014

Homework Help: math,algebra

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

First Name:
School Subject:
Answer:

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 ...
algebra - An executive bought 300 stamps for $73.80. The purchase included 15 ...
intermediate algebra - A business executive bought 40 stamps for $13.68. The ...
Maths - Hi I have a maths problem I can't figure out please someone help. Zac ...
math - suppose you bought some 32 cent stamps and some 20 cent stamps. you spent...
Math !-_- - Please help me out. Omg...i absolutley hate math. I try my best but...
math - still can't solve .32x + .20y = 3.92 it's my last math question for the ...
math - suppose you bought some 32 cents stamps and some 20 cents stamps. you ...

Search
Members