Select the correct answer. Which statement best describes ΔPQR with vertices P(1, 2), Q(4, 4), and R(6, 1)?
A.
ΔPQR is scalene with side lengths PQ = 3.16, QR = 3.61, and PR = 5.1.
B.
ΔPQR is isosceles with side lengths PQ = 3.61, QR = 3.61, and PR = 5.1.
C.
ΔPQR is scalene with side lengths PQ = 3.61, QR = 3.16, and PR = 5.1.
D.
ΔPQR is isosceles with side lengths PQ = 3.61, QR = 5.1, and PR = 3.61.

x=4

step-by-step explanation:

(c, 0) i might be wrong so don't put full faith on my 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.