Xavier needs to bike a minimum of 90 miles this week for his training. If he has already biked 18 miles this week, then how many miles should he bike on each of the 6 remaining days this week?​

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?

Having a hard time understanding this question (see attachment).

Aset of 4 consecutive integers adds up to 354. what is the value of the least integer?