A 6 foot rope is cut into 1/2 pieces. how many pieces of rope are there?

What is the missing constant term in the perfect square that starts with x^2 -20x

Iq scores for adults age 20 to 34 years are normally distributed according to n(120, 20). in what range does the middle 68% of people in this group score on the test?

The border line of the linear inequality 4x + 7y < 5 is dotted true or false?