43. Make Sense and Persevere The lowest and leftmost note on a piano keyboard is an A.
The next lowest A is seven white keys to
the right. This pattern continues. Write an
explicit formula for an arithmetic sequence to
represent the position of each A key on the
piano, counting from the left. If a piano has
52 white keys, in what position is the key that
plays the highest A?

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?