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September 22, 2014

September 22, 2014

Posted by **Help** on Thursday, November 29, 2012 at 6:46pm.

Answer must include a Let Statement, an equation, a proper solution (using Properties of Equality).

Would this answer be correct ?

Let X=friends

3a + 1 = 13

3a = 13-1

3a = 12

12/3 = 4

4 friends went to see the play with Rose

- Math -
**Reiny**, Thursday, November 29, 2012 at 7:47pmyes you are correct

You could have checked your answer by simply working it out with your answer

what is 1 + 4(3) ???

- Math -
**Help**, Thursday, November 29, 2012 at 7:53pmI know, but wanted to be sure about the let statement, equation parts they were asking for. Thanks.

- Math -
**Reiny**, Thursday, November 29, 2012 at 8:03pmYour "let" statement should be a complete English sentence with proper grammar

e.g.

let the number of friends that went with her be x

3x + 1 = 13

3x = 12

x = 4

So , four friends went with her.

- Math -
**Help**, Thursday, November 29, 2012 at 8:27pmOk.. Can u check these for me too please?

Rename each repeating decimal as a fraction in lowest terms. Using let statement, an equation, a proper solution (using properties of equality)

1) 0.87 (repeating nos are 87) So..

Let X = 0.87

100X = 87.87

- X = 0.87

____________

99X/99 = 87/99

X= 29/33

2) 0.5406 (repeating nos are 06) So...

Let X = 5406

10,000X = 5406.5406

- X = 0.5406

________________________

9999X/9999 = 5406/9999

5406/9999 = 1802/3333

X= 1802/3333

3) 0.048 (repeating no is 8). So...

Let X = 0.048

1000X = 48.8

-100X= 4.8

_______________________

900X/900 = 44/900

X=11/225

4) 3.274 (repeating nos are 74)

I really don't get this one

- Math -
**Reiny**, Thursday, November 29, 2012 at 8:43pm#2 is not correct, you should have checked your answer with a calculator

Here is the way I would do that one

let x = .54060606...

times 100, since 2 digits repeat

100x = 54.060606

subtract

99x = 53.52 , make sure you line up the decimals in the subtraction to see how I got that

x = 53.52/99 = 5352/9900

now reduce ...

= 446/825

on calculator: 446/825 = .54060606...

#4.

3.274 , just work on the decimal part

let x = .274747474..

times 100 , (remember why ? )

100x = 27.47474...

99x = 27.2

x = 27.2/99 = 272/990 = 136/495

now don't forget about the original whole number in front

3.274 = 3 136/495 as a mixed number

or

1621/495 as an improper fraction

check: 136/495

- Math -
**Help**, Thursday, November 29, 2012 at 9:59pmReiny ...Thank you so much for your helpfulness and kindness. Goodnight...

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