What is the value of the expression 6m+m-4(-2m+1-m) when m=-8

Guests at an amusement park must be at least 54 inches tall to be able to ride the roller coaster. which graph represents the set of heights that satisfy this requirement?

How do i make someone brainliest? (if you answer me, i might be able to make you brainliest! )

Which of the points a(6, 2), b(0, 0), c(3, 2), d(−12, 8), e(−12, −8) belong to the graph of direct variation y= 2/3 x?