All the student in the 6th grade either purchased lunch or brought their lunch from home. 24% of the students purchased lunch 190 students brought lunch from home. How many student are in the 6th grade?

Points j and k plotted on the coordinate grid are two vertices of rectangle jklm rectangle jklm has an area of 7 square units point j is located at 2,1 and point k is located at -5,1 each vertex of the rectangle is located at a point that has integer coordinates. what is the perimeter of rectangle jklm? (need answer asap)