Erin's father needed to purchase videotapes. He saw two signs: "Top quality tapes--5 for $14.85" and "Great Quality Tapes---3 for $8.85." What was the unit price of each item? Which was a better bargain?

60

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.

this is a good question! i'll do some research and come back when i have the answer!

10 - 8 = -2

  8 - 6 = -2

etc, so -2 is the common difference

step-by-step explanation: