Expand the following:
a. x(x+5)
b. x(3x-1)
c.2x(2x+3)
d.5x(x-3y)

Imagine a new pasture with grass growing on it. every day after the seeds have germinated, the number of blades of grass in the pasture triples. after 18 days, the entire pasture is completely covered in grass. how many days did it take for the pasture to be one-third covered in grass?

How many kilometers are equal to 5 miles? use 1 mile ≈ 1.61 kilometers. !

Henry is an avid reader, he devours 90 pages in half an hour how many pages has henry read per minute?