4schools sent students to a language corse.
one of the schools sent both french and german students.
the ratio of french to german students was 1: 3.
the school sent 21 german students
the other 3 schools sent the same number of students .
work out the total number of students sent to the language corse

Ined this is due tomorrow and i dont know the answer can you find all the exponents

At the olympic games, many events have several rounds of competition. one of these events is the men's 100-meter backstroke. the upper dot plot shows the times (in seconds) of the top 8 finishers in the final round of the 2012 olympics. the lower dot plot shows the times of the same 8 swimmers, but in the semifinal round. which pieces of information can be gathered from these dot plots? (remember that lower swim times are faster.) choose all answers that apply: a: the swimmers had faster times on average in the final round. b: the times in the final round vary noticeably more than the times in the semifinal round. c: none of the above.

The table represents a function f(x). what is f(3)? a.-9 b.-1 c.1 d.9