Students preferred dubstep, 25 % of the students liked trance music, and 20 % wanted to hear only house music. Fifteen percent of the respondents selected both dubstep and trance. The proportion of students that like either dubstep or trance is:

proportion of students that like either dubstep or trance is 40%

Step-by-step explanation:

Students preferring dubstep : Set [DS]  = 30%

Students preferring trance music : Set  [TM] = 25%

Students preferring house music : Set [HM] = 20%

Students preferring both dubstep & trance  : Set [DS ⋂ TM] = 15%

Formula : (A U B) = (A) + (B) - (A  ⋂ B)

[ DS U TM ] =  [DS] + [TM] - [DS ⋂ TM]

= 30% + 25%  - 15% → = 40%

sites:

b. would be the answer : )

step-by-step explanation:

step 1: add -16x to both sides.

16x−4y+−16x=64+−16x  

−4y=−16x+64

step 2: divide both sides by -4.

−4y /-4 = -16x + 64/-4

answer:   y=4x−16

hope i'm right