A crooked shopkeeper sells goods at the cost price. But his 1 kg weight weighs 900 g only. Find his gain percent.

Apatient is to be given 35 milligrams of demerol every 4 hours. you have demerol 50 milligrams/milliliter in stock. how many milliliters should be given per dose?

The box plots show the average speeds, in miles per hour, for the race cars in two different races. which correctly describes the consistency of the speeds of the cars in the two races?

Which expression is the factorization of x^2+10+21