Please help me I really need help

(a) solve the euler's equation x3y +xy -y 0. (b). solve the higher order equation y' +2y" 11y' 12y=0

The cost of a concert ticket last week was $60 this week a concert ticket is $75 what is the percent increase of the ticket from last week to this week

Marion has a bicycle that she is planning to take for a ride. the room of the rear wheel why is 41 cm from the center of the wheel. the tire itself has the thickness of 3 cm. in order to marion to ride her bike 96,712 cm approximately how many rotations for the rear wheel make ~350 ~376 ~5133 ~15.9