these question i dun understand.. and i dunno how to do.. can some 1 help plz.. question.. 2,3,4,5

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- Jun 8th 2006, 07:24 AMxiaozHELP~ i dun understand!!!
these question i dun understand.. and i dunno how to do.. can some 1 help plz.. question.. 2,3,4,5

- Jun 8th 2006, 09:48 AMCaptainBlackQuote:

Originally Posted by**xiaoz**

multiply top and bottom by $\displaystyle 1000$:

$\displaystyle 530 \div 0.025=\frac{1000\times 530}{1000\times 0.025}=\frac{530000}{25}$

2b The cost of dinner is the price of the food plus a 4% service charge.

A diner paid $93.60, what was the price of the food?

Let $\displaystyle \$x$ be the price of the food, then the diner pays:

$\displaystyle x+0.04x=1.04x=93.5$,

so:

$\displaystyle x=\frac{93.5}{1.04}$ dollars.

RonL - Jun 8th 2006, 10:43 AMThePerfectHacker
3a.

The next number of the sequence is found by adding the previous ones. This is called fibonacci sequence. - Jun 8th 2006, 10:49 AMThePerfectHacker
6a,

$\displaystyle 5<6x-13<7$

Add 13,

$\displaystyle 18<6x<20$

Divide by six,

$\displaystyle 3<x<3.333$

6b,

You have,

$\displaystyle \frac{7}{11}<x<\frac{8}{11}$

For example if,

$\displaystyle x=\frac{7.5}{11}$

But express it as a fraction,

$\displaystyle x=\frac{\frac{15}{2}}{11}=\frac{15}{22}$

6c,

You have,

$\displaystyle x^{2y}=5$

then cube both sides,

$\displaystyle x^{6y}=125$

Mutiply by 2,

$\displaystyle 2x^{6y}=250$

subtract by four,

$\displaystyle 2x^{6y}-4=246$