Jon has to pay $9 admission for the skating rink and $2 per hour to rent rollerblades. how many hours can he skate for $19?

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%)

Aof 12 , we to a of 4 to on a .of 4 be ?

What are two numbers that have a sum of 15