Solve the equation: cos78= 13/x

An unknown number of kids and buses are getting assigned. when assigning 4 kids to each bus, there are 2 kids that aren't placed in a bus. when assigning 8 kids to each bus, there are 2 empty buses. how many total kids are there?

1.based of the diagrams what is the the value of x? 2.how would you verify your answer for x

Determine the standard form of the equation of the line that passes through (-2,0) and (8,-5)