at the local printing company there are two kinds of printing presses: model A which can print 70 books per day and model B which can print 55 books per day. how many of each type of press do they have?

Which expression is equivalent to 8(k + m) − 15(2k + 5m)?

If the speed of an electromagnetic wave is 100,000 cm/s and its wavelength is 100 cm, what is its frequency? a) 100,000 cycles per second (hz) b) 1 × 10-3 cycles per second (hz) c) 10,000,000 cycles per second (hz) d) 1,000 cycles per second (hz)

Inez has a phone card. the graph shows the number of minutes that remain on her phone card a certain number of days.