A customer needs 60 pencils. If he buys them on sale, how many of the 60 pencils can he get for free?

An an average person has 6×10 by the power of two as many red blood cells as white blood cells a small sample of the blood has 7×10 by the power of three white blood cells about how many red blood cells are in the sample

Factor completely. 4p^2 + 36p + 81 express the answer in the form (ap + b)^2

Find the greatest common factor of -30x 4 yz 3 and 75x 4 z 2.