Chad bought a watch that normally costs w dollars. He used a 30% discount. The expression 0.7w describes the amount of money Chad paid for the watch. We can also use the expression
w -0.3w to represent the same quantity.
Match each amount in the situation with the expression that represents it.
Situation
Expression
Amount the watch normally costs
w
Amount of the discount
0.7
Percent decrease of the discount,
a decimal
0.3
Percent of the normal cost that Chad paid, as a decimal
0.3w
Chu Waid
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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?