Mr. dotson wants to know if the neighbors on his street would be interested in a community watch. he surveys every fourth household on the street and concluded that 70% would be interested. a. not valid, because he should have surveyed people in the entire city. b. there is no way to determine if the conclusion is valid or invalid. c. valid, it is an unbiased systematic random sample. d. not valid, because he needs to survey every person for it to be accurate.

Sum is 17 and their difference is 3

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?

M∠cbd=4x+52∘ m∠abc=8x−10∘\qquad m \angle abc = 8x - 10^\circm∠abc=8x−10∘ find m∠cbdm\angle cbdm∠cbd: