At a butcher shop, Karl bought 10 1/4 lbs of beef and some pork. He left with 19 9/20 lb of meat. Express the number of pounds of pork he bought using a decimal Karl bought lb of pork.

The ratio of rock songs to dance songs on jonathan’s mp3 player is 5: 6. the total number of rock and dance songs jonathan has is between 101 120. how many rock songs does he have?

Solve each quadratic equation by factoring and using the zero product property. 14x - 49 = x^2

Suppose that in 2008 , 840,800 citizens died of a certain disease assuming the population of teh country is 399 miliion, what is the mortality rate in units of deaths per 100,000 people?