A game that costs $72 is on sale for 20% off. It has a sales tax rate of 7.5% 20 on the sale price. What is the final cost of the game? ​

$61.92

Step-by-step explanation:

Lets start by applying the sale(discount) on the game. 20% off is synonymous with having 80% of something(the remaining part), so we can multiply 72*.8 in order to get $57.6

Now lets apply sales tax. A simple way to calculate total price when a tax or increase is present is by adding 100% to the % and multiplying. In this case, we would have

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step-by-step explanation:

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.