Sammie bought just enough fencing a rectangular plot, as shown below. the perimeters of the plot are the same . how many feet of fencing did she buy?

2-digit numbers less than 91 which are 1 less than a multiple of 10

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?

Consider 6x2 + 6x + 1. which term immediately tells you that this expression is not a perfect square trinomial? justify your answer