Help me find the perimeter of these points
L(-5,0), M(4,0), N(1, -2), O(-1,-2)

Tim's phone service charges $26.39 plus an additional $0.21 for each text message sent per month. if tim's phone bill was $31.64, which equation could be used to find how many text messages, x, tim sent last month?

Consider the set of all four-digit positive integers less than 2000 whose digits have a sum of 24. what is the median of this set of integers?

Find the zeros of each function. f(x) = x^2 + 5x - 6