Apair of pants cost 50% more than a tie. a shirt cost 25% more than the same tie. by what percentage is the cost of the pair of pants greater than the cost of the shirt?

Answer

20%

Explanation

let the cost of tie = x

Then cost of a pair of pants = (100+50)%x

                                               = 150%x

                                                 = 1.5x

The cost of shirt = (100+25)%x

                           = 125%x

                             = 1.25x

(1.5x - 1.25x)/1.25x × 100

0.25x/1.25x × 100

0.2 × 100 = 20%

solution:

the given function is ,

      =

the three roots of this quadratic function is , 0 ,8 and 10.all the roots are real and rational.

if a quadratic equation is of the form ,

sum of the roots = a + b +c= 0+8+10=18=  

product of roots taken two at a time = a b + b c+ c a = 0+80+0=80 =  

product of roots = a b c = 0=  

there are 11 doors in a hall starting from 0 to 11.the entry in the hall is permitted through gate number 0 and exit is allowed through only gate number 8 and 10.so, three roots(0,8,10) of quadratic function is given by entry and exit route of this hall.

first, you divide the triangle in two, tô form a retangle triangle. after, using pythagoream theorem:

18^2 = 14^2 + (x/2)^2

(x^2/4) + 196 = 324

x^2/4 = 324 - 196

x^2/4 = 128

x^2 = 512

x = √512

x = √2^9

x = 16√2 cm

i hope i you.