Igloos Unlimited charges $150 per night, with a 50% discount every night after the third night. If you stay for eight nights, how much will you pay?

(150x3)+((150/2)x5)=(450)+((75)x5)=450+375=825. You would have to pay $825.

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 )

b, i believe, but not sure.