The sum of the numerator and denominator of a fraction is 3 less than twice the denaominator if the numerator and denominator are decreased by 1 the numerator becomes half the denominator

answer:

step-by-step explanation:

the numerator be 'x' and denominator be '  y'

then,

the sum of the numerator and denominator of a fraction is 3 less than the twice is x+y=2y-3 : - x-y+3=0 - equation 1

if  the  numerator and denominator is decreased by 1 then

x-1/y-1=1/2 : - 2(x-1) = 1(y-1) : - 2x-y-1=0 -equation 2

then equation 1 = equation 2

x-y+3=2x-y-1 : - x=4

from  the equation 1 

x-y+3=0 : - 4-y+3=0 : - y=7

there fore the fraction is 3/7 

80π/3 or about 83.775

step-by-step explanation:

since a cone is 1/3 of a cylinder, we need to find the base's area. since area = πr^2, we get 16π. then, multiplying this by 5, we get 80π. dividing by 3, since the cone's volume is 1/3 of that of a cylinder's, we get 80π/3.

hope this !