aida bought 50 pounds of fruit consisting of oranges and grapefruit. She paid twice as much per pound for the grapefruit as she did for the oranges. if aida bought $12 worth of oranges and $16 worth of grapefruit, then how many pounds of grapefruit did she buy?

In a coastal town, the humidity, measured in grams of water per kilogram of air, increases by 43% for every 1 degree celsius increase in temperature. a scientist observes that the humidity on monday morning is 5.75 grams per kilogram. he wants to know how much the temperature must increase for the humidity to reach at least 49.17 grams per kilogram. let t represent the increase in temperature, in degrees celsius, from monday morning's observation. write an inequality to represent the situation, and use it to determine the desired temperature increase.