Aride sharing company charges a pick-up fee plus a charge per mile. gus paid $12.00 for a 6.5-mile ride. tony paid $15.50 for a 9-mile ride. determine the companies charge per mile for a ride.

The first week samantha learned to read braille, she could read 10 words per minute. in the second week she increased her speed by 20%. in the third week she increased her speed again by another 25%. how many words could she read per minute by the third week? hurry and tell me!