Barbie is thinking of a number. twenty less than one third of the number is 72.

Gregory draws a scale drawing of his room. the scale that he uses is 1 cm : 4 ft. on his drawing, the room is 3 centimeters long. which equation can be used to find the actual length of gregory's room?

Use the data on the dot plot to answer the question. how many people read for more than three hours last week? i'm on a unit test review

Complex numbers multiply √-4 * √-25 and show all intermediate steps. alternative notation is sqrt(-4) * sqrt(-25).