The expression to find the perimeter of a rectangle is 2(length + width). what is the perimeter, in units, of a rectangle of length one third unit and width one half unit?

The system of equations graphed below has how many solutions?

Pls if a cow has a mass of 9×10^2 kilograms, and a blue whale has a mass of 1.8×10^5 kilograms, which of these statements is true?

Fanny mendelssohn manages all the magazines and paperback books at a local grocery store. she prices many paperbacks to sell at $7.99. the cost to the store is $5.29. what is the markup rate on a paperback book, based on its cost?