En un gallinero se tienen 15 gallinas, estas terminan un bulto de alimento en 26 días. ¿En cuántos días se acabarán el mismo alimento 23 gallinas?

Gregory draws a scale drawing of his room. the scale that he uses is 1 cm : 4 ft. on his drawing, the room is 3 centimeters long. which equation can be used to find the actual length of gregory's room?

Complete the solution of the equation. find the value of y when x equals to 6 4x+y=20

Serena is making an experiment. for that, she needs 20 grams of a 52% solution of salt. she has two large bottles of salt water: one with 40% and the other with 70% of salt in them. how much of each must she use to make the solution she needs? i am in need of