Jenny's average on 4 exams is 80. Assuming she cannot earn more than 100 on any exam. What is the least she can earn on her 5th exam and still have a chance for an average of 84 after seven exams?

Samad was planning on depositing a certain amount of money each month into a bank. He then decided not to make...

A salesman usaally makes 45% profit on every TV he sells. During a sale, he reduced his margin of profit to 40...

Since 1999 , Roby has gained 2 kilograms of weight every year, In 2009 he was 25% heavier than in 1999 . How m...

The length of a rectangle is 6 cm more than the side of a square, and the width of the rectangle is 6 cm less...

If x is negative , all BUT which of the following must also be negative?

A drug store usually sells a certain medicine at 40% profit . During a sale, the medicine was sold for 10% les...