Pls help asap i’ll make brainliest

Which one is true about the hexagons ?

The measurement of one angle of a right triangle is 42° what is the measurement of the third angle? (there is no picture)

Barrett is comparing the membership fees for two museums. the art museum charges a one-time fee of $8.25 plus $2.25 per month. the science museum charges a one-time fee of $10.75 plus $3.50 per month. how much does barrett save by joining the art museum instead of the science museum?