For a triangle, list the respective names of the points of concurrency of (a) perpendicular bisectors of the sides (b) bisectors of the angles (c) medians (d) lines containing the altitudes

1-for what value of x is line a parallel to line b 2-for what value of x is line a parallel to line b

The function models the number of accidents per 50 million miles driven as a function

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