Shreya left the hardware store and drove toward the train station. One hour later Jill left driving 13 km/h faster in an effort to catch up to her. After five hours Jill finally caught up. What was Shreya's average speed?​

Name each raycalculation tip: in ray "ab", a is the endpoint of the ray.

The volume of gas a balloon can hold varies directly as the cube of its radius. imagine a balloon with a radius of 3 inches can hold 81 cubic inches of gas. how many cubic inches of gas must be released to reduce the radius down to 2 inches?

65% of students in your school participate in at least one after school activity. if there are 980 students in you school, how many do not participate in an after school activity?