Katie added all the integers from –20 to +20 in her head. explain how could she

have done that.

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

Aline passes through 3,7 and 6,9 what equation represents the line

Peter measures the angles in a triangle. he finds that the angles are 95, 10 and 75. is he correct? explain your answer