What’s the answer to (3a+2b-4c)+(-a+6b+11c)

Sara needs to take a taxi to get to the movies the taxi charges $4.00 for the first mile and then $2.75 for each mile after that if the total charge is $20.50 then how far was sara’s taxi ride to the movie

The distance between two cities is 368 miles. if the scale on the map is 1/4 inch=23 miles, what is the distance between the cities on the map?

Show your workcan a right triangle have this sides? *how to prove it without using the pythagorean theorema*