En un corral tengo 10 vacas, las cuales consumen su alimento en 15 días, si eh comprado 4 vacas más, ¿cada cuánto tendré que comprar alimento? (Anota formulas y operaciones) lo ocupo please

The surface area (sa) of a cube with a as the length of each of its sides is given by the formula . if the surface area is known, how can you rewrite the formula to find its side?

Imogene invested $8,000 in a bank account that pays 8 percent simple interest at the end of each year. her friend invested the same amount in stocks where the growth of the investment is represented as 2,000 times the square root of 2 less than the time lapsed in years. if y1 and y2 represent the amount earned in dollars and t is the time lapsed in years, which system of equations correctly represents the situation?

If 1/√5+1/√5+1=p+q√r , find the values of p, q and r