Which inequality's graph will have a dashed boundary line?

a.)x + 7y > 3

b.)7x + y ≤ 3

c.)6x − 5y ≥ 4

d.)y − x ≤ 3

Tina practice piano for 15 hours last month and 45 hours this month use multiplication to write a statement comparing me i was tina practice during the two months use addition to write a statement comparing the hours tina practice during the two months

The weight of a radioactive isotope was 96 grams at the start of an experiment. after one hour, the weight of the isotope was half of its initial weight. after two hours, the weight of the isotope was half of its weight the previous hour. if this pattern continues, which of the following graphs represents the weight of the radioactive isotope over time? a. graph w b. graph x c. graph y d. graph z

Either enter an exact answer in terms of \piπ or use 3.143.14 for \piπ and enter your answer as a decimal.