Kristin spent $131 on shirts. fancy shirts cost $28 and plain shirts cost $15. if she brought a total of 7 then how many of each kind did she buy?

Classify each polynomial by its degree and by its number of terms.

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)

Stefanie is painting her bedroom. she can paint 2 1/3 square feet in 4/5 of an hour. how many square feet can she paint in one hour?