Question

the numerator of a fraction is 4 less than its denominator. if the numerator is deceased by 2 and the denominator is increased by 1 then the fraction becomes 1/8. find the fraction​

Answer 1

Let the numerator be 'x'.

=> Denominator = x + 4

The fraction = $\frac{x}{x + 4}$

Numerator is decreased by 2 and the denominator is decreased by 1 [Given}

$\frac{x - 2}{x + 4 + 1} = \frac{1}{8}$

$\frac{x-2}{x+5} = \frac{1}{8}$

$8(x-2) = 1(x+5)$

$8x - 16 = x + 5$

$7x = 21$

$x = 3$

The fraction is $\frac{3}{7}$

Answer 2

Answer:

Calcium nitrate decomposed on heating according to the equation: 2 Ca(NO3)2 - 2CaO + 4NO2 + O2 The molecular mass of calcium nitrate is 164 u. ... the volume of nitrogen dioxide (NO2) obtained at S.T.P. a the weight of calcium oxide obtained when 16.4 g of calcium nitrate is heated to constant weight.