The following system has a solution: x= 10,y=-3,z = 14
3x + 7y-z= -5
9x-y-4z = 17
5x - 12y-z=0

Afarm that has 4 x 10^2 acres has 1.2 x 10^5 cattle. what is the average number of cattle per acre? write the answer in scientific notation. answere asap

Afrequency table of grades has five classes (a, b, c, d, f) with frequencies of 3, 13, 14, 5, and 3 respectively. using percentages, what are the relative frequencies of the five classes?

Can anyone me with this question?