The table shows the battery life of four different mobile phones. mobile phone battery life phone battery life (hours) a 20 b 25 c 10 d 18 if 6.45% of the battery life of each mobile phone is used in a day by a typical user, for which mobile phone is 1.6125 hours of battery life used in a day?

to find this you would take each answer and multiple it by 6.45% so A=1.29 , B=1.6125,C=0.645,D=1.161 so the correct answer is B.

an

y = 6x -3y -12

y +3y +12 = 6x

=> . x = { 2y / 3 +2 } this is equation of line in terms of x

=> . if line meets the x-axis the co-ordinates of meeting point would be ( x , 0 )

=> . x = 2 ( 0 ) / 3 + 2

=> . x = 2

so, the point is ( 2 , 0 )