Combining like terms simplify each expression 4n - n

The vertices of a triangle are a(7,5), b(4,2), c(9,2). what is m

What are the coordinates of the midpoint of ab? ,1/2) /2,-1) ,-3/2) /2,-2)

Jayne is studying urban planning and finds that her town is decreasing in population by 3% each year. the population of her town is changing by a constant rate. true or false?