Ollive buys clothes at a store with a total bill of $54.50. She has a 20% off coupon and pays 7.5% sales tax. She calculates the total cost of the clothes, using the expression: (54.50 - 1.20) (1.075).
Explain the error in Olive's reasoning.
Determine the correct expression and explain your reasoning.

30 units^2

step-by-step explanation:

area is l × w

the length is 3

and the width is 10

3 × 10= 30 units squared

i believe the correct answer is b.

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.

for future students the answer is b

hope i

-lavira: )