these question i dun understand.. and i dunno how to do.. can some 1 help plz.. question.. 2,3,4,5
2a $\displaystyle 530 \div 0.025=\frac{530}{0.025}$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
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,
$\displaystyle 2x^{6y}-4=246$