38-39. a right triangle has 2 equal sides that measure 12 inches is cut from plate. it has a 3" square cut out of
the center. what is the total area left of the triangle?

63  inch²

Step-by-step explanation:

area of triangle: (12 x 12) / 2 = 72

area of square cut out: 3 x 3 = 9

area left: 72 - 9 = 63

215.92 dollars is the answer

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.