Andrew is 3 times as old as his sister Ellie. Andrew is 12 years old. Which equation can you use to find Ellie's age?

A.
3
×
12
=
a
B.
12
−
3
=
a
C.
3
×
a
=
12
D.
a
×
12
=
3

c

Step-by-step explanation:

3 x 12 is the correct answer

Step-by-step explanation:

Hope that helps :)

32/80  

91/140

the last one 54 doesn't go into 45. 54/100 ?

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.