Martha made 3 birthday cards and she wants to make more. if she makes 5 cards an hour, how many cards will she have after 6 hours?

The measure of one angle of an octagon is two times smaller that of the other seven angles. what is the measure of each angle?

Astudent must have an average on five test that is greater than it equal to 80% but less than 90% to receive a final grade of b. devon's greades on the first four test were 78% 62% 91% and 80% what range if grades on the fifth test would give him a b in the course? ( assuming the highest grade is 100%)

What are the greatest common factor of 75 and 30