Just draw one empty circle for 1 and then a filled circle for -1 so then it's 1-1 which equals 0
Tan x = 8749/675
x= arctan (8749/675) arctan = tan^-1
x=85.59 degrees
According to the question statement, the total sum of students is 221, which includes the students that ride on bus and the students that ride in a van.
The students that ride in a van are five, the students that ride on bus are 6 times s which is the product of the number of buses and the number of students that are on each bus.
Write all this information into an equation, this way:

Now, solve the equation for s to find the number of students that are on each bus.

There are 36 students on each bus.