Mean = Sum of points / Number of points ;
27 = ( 25 + 28 + 36 + 21 + 28 + 15 + 24 + 30 + x ) / 9 ;
243 = 207 + x ;
x = 36 is the number ;
Answer:
Step-by-step explanation:
A∩B=[-54,-42]∪[-25,70]
Step-by-step explanation:
let 6x-3y =3 be equation 1 and -2x +6y=14 be equation 2
take 2 common from eqn 2 let the optioned eq be equation number 3
and solve eq number 1 and 3