Maria's family drove 140 miles to her grandparents' house and averaged 56 mi/h on the way there. on the return trip, they averaged 50 mi/ hr. what was the total time maria's family spent driving to and from her grandparents' house? a. 2.5 h b. 2.6 h c. 5.2 h d. 5.3 h

7. the area of the playing surface at the olympic stadium in beijing isof a hectare. what area will it occupy on a plan drawn to a scaleof 1: 500?

Find the greatest common factor of the followig monomials 21u^5v,3u^4v^6, and 3u^2v^5

Why can't my rank go i have 1723 points, but my rank is only at ambitious, which is only 250 points! like, (p.s. i know this isn't related to math, but i just don't know why it's doing this and i would really appreciate if someone could tell me whats going on with this)