five Students have a mean age of 15 years 4 months. when another student joins the group, the mean age becomes 15 years 6 months. How old is the student who joins the group?​

What is the number 321,000,000 in scientific notation? also what is the number? ?

Jayne is studying urban planning and finds that her town is decreasing in population by 3% each year. the population of her town is changing by a constant rate.true or false?

Which of the following describes how to translate the graph y = |x| to obtain the graph of y = |x+1|+1? shift 1 unit left and 1 unit down shift 1 unit left and 1 unit up shift 1 unit night and 1 unit down shift 1 unit nght and 1 unit up