Can someone tell me at least three angles in algbra?

If the measure of xyz is 81 what is the measure of yz

If there are 12 moths and some have 31 days and others have 30 days how many have 28 days?

Cassie is traveling 675 miles today to visit her brother and his family. so far, she has stopped for gas three times. at the first stop, she put in 7.1 gallons of gas and paid $23.79. at her second stop, she put in 5.8 gallons of gas and paid $19.08. and, at the third stop, 6.6 gallons and paid $20.39. at which stop did casey pay the most for gas?