An antique vase sells for $80. If the price increases by 18%, and then decreases by 20%, what is the new price?

$113.28

Step-by-step explanation:

18% of 80 = 14.40

80 + 14.40 = 94.40

20% of 94.40 = 18.88

94.40 + 18.88 = 113.28

step-by-step explanation:

the first 5 right here the next 5 i will upload as separate question

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.