Help please , will mark brainliest

200 in^2

Step-by-step explanation:

First step- the first square shows the lenght and the bottom shows the width and 10 times 10 is 100

step 2- so the first is 100 double it and 100 times 2 is 200

Step 3- so 200 inches^2 is your anwser.

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.

x= cost per bracelet

number of bracelets * x + shipping charge = total cost

so

9x+9=72