Abag has 7 red marbles 8 blue marbles and 3 black marbles what is the probability of picking a black marble replacing it and then picking a red marble

Convert the mixed numbers into improper fractions. convert the improper fraction to mixed numbers.

Which expression demonstrates the use of the commutative property of addition in the first step of simplifying the expression (-1+i)+(21+5i)+0

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