how many times can a rectangle be reflected across an axis of symmetry so that it carries onto itself

Answer question above and explain each step : )

Aline has a slope of and a y-intercept of –2. what is the x-intercept of the line?

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