Thursday

February 11, 2016
Posted by **rawr... im a dinosaur.... rawr** on Saturday, October 20, 2012 at 2:18am.

a customer earned 3262.50 interest on a 9-month cd. how much was the opening deposit

total cost-- 1600 boat, 5.5% sales tax

cd player-- regular price, $89, sale price $80

what is the total cost of a computer that had a price of $1500 and sales tax of 7%

a cd player costs $99 plus 5% tax. what is the total price of the cd player

find the percent of discount to the nearest percent if a calendars regular price is $9.00 and the sale price is $2.25

I will post my answers in a few minutes.

- Algebra Grade 7 -
**rawr... im a dinosaur.... rawr**, Saturday, October 20, 2012 at 2:35amX- when hugo was 9 years old he was 56 inches

tall. hugo is now 12 years old and he is

62 inches tall. fins the percent of increase in

hugos height to the nearest tenth

X- a customer earned 3262.50 interest on a

9-month cd. how much was the opening

deposit

**total cost-- 1600 boat, 5.5% sales tax

X- cd player-- regular price, $89, sale price $80

**what is the total cost of a computer that had a

price of $1500 and sales tax of 7%

**a cd player costs $99 plus 5% tax.

what is the total price of the cd player

**find the percent of discount to the nearest

percent if a calendars regular price is $9.00

and the sale price is $2.25

** 1600 • 0.055 = 88

**1500 • 0.07 = 105

**99 • 0.05 = 4.95

**2.25/9 = 25%

X = I don't know please help.

- Algebra Grade 7 -
**Shell**, Sunday, October 21, 2012 at 12:38pmHugo:

12-9=3years

62-56=6inces

6 is what present of 56?

6 = x * 56

6/56=x

3/28=x

x=0.10714286

the the nearest tenth,

x=0.1

Interest:

x=opening deposit

y=interest rate (some decimal number or percent[which is then turned into a decimal])

$3262.50 over the course of 9 months is

3262.50/9=$362.5 per month

What is the interest rate of the equation?

x*y=362.5

x=362.5/y

Total Cost, Boat:

sales tax equations:

x=price

y=percent tax

z=final price

x+(x*y)=z

x*(1+y)=z

$1600, 5.5%

1600*.055=88

so sales tax is $88, plus(!) the cost of the actual boat so

1600+88=1688

total cost=$1688

CD Player1-Discount

Sales: % less/markdown

x=original price

y=percent discount

z=final price

x-(x*y)=z

x*(1-y)=z

x=$89, y=solve for, z=$80

x*(1-y)=z

(x*(1-y))/x=z/x

1-y=z/x

-1 = -1

-y=(z/x)-1

y=1-(z/x)

y=1-(80/89)

y=1-.8989

y=0.1011

10.11% discount

Computer

105+1500=1605

CD Player2-Tax,

4.95+99=103.95

Calendar

1-(2.25/9)=.75

discount is 75%

I gave you the equations, and the explanations, so hopefully, you will be able to get farther the next time. the answers you gave were correct, but you were missing the next step to the problems. If you need/want to, write the equations down, so that you have them if you ever need them. and if you learn how to "translate" English math problems to math equations (like I did in Hugo), word problems won't as difficult. It takes a while, and a lot of practice, and it helps if they are lined up the correct way (like how I wrote Hugo) and not backward (like they sometimes are) but practice and you'll get it.

- Algebra Grade 7 -
**Anonymous**, Sunday, April 6, 2014 at 6:01pmA customer earned $3,262.50 interest on a 9-month CD. How much was the opening deposit

- Algebra Grade 7 -
**qrty**, Tuesday, December 9, 2014 at 8:21pmpooop

- Algebra Grade 7 -
**tautaiara**, Tuesday, January 6, 2015 at 10:53amFind the percent of discount to the nearest percent.

CD player: regular price, $89

sale price, $80