Find the missing value. 19) (4, 16) and (24)
XE
21) (x) -16) and (6, 24)
X
23) If y
80 when x
32, find x when 100
X =
25) Ify = -7 when x = -28, find y when x
20
Y=

b. astronomers

4a. is 3 miles every hour

4b. is 1/3 of an hour per mile

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.