If one of the variables in a linear inequality in two variables is not presented because its coefficient is understood to be 0, it is only necessary to test a value of the other coordinate to determine which side of the line is the shaded region. true or false

Solve the problem by using a venn diagram a group of students were surveyed about their taste in music.they were asked how they like three types of music: rock, country western and jazz.the results are summarized below: no one dislikes all three types of music.six like all three types of music.eleven don’t like country western.sixteen like jazz.three like country western and jazz, but not rock.six don’t like rock.eight like rock and country western.seven don’t like jazz.how many students were surveyed?