Two cars got an oll change at the same auto shop. The shop charges customers for each quart of oll plus a flat fee for labor. The oll change for one car required 5 quarts of oil and cost $21.40. The oll change for the
other car required 7 quarts of oil and cost $23.90. How much is the labor fee and how much is each quart
of oll?

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?