set notation

The set of months that contain less than 30 days. Let M be the set. Only February has less than 30 days out of the 12 months. M = {February}

Set C is the set of two-digit even numbers greater than 72 that do not contain the digit 8. First, two-digit numbers mean anything less than 100. Let's, list out our two-digit even numbers greater than 72 but less than 100. C = {74, 76, 78, 80, 82, 84, 86, 88, 90, 92, 94, 96, 98} The problem...

Let x be our variable: We write x, such that x is greater than 4 below: {x | x > 4}

Two digit Numbers less than 56: {10, 11, 12, ..., 55} Two Digit Even Numbers of that Set: {10, 12, 14, ..., 54} Two Digit Even numbers Divisible by 5 C = {10, 20, 30, 40, 50} Note: Even means you can divide it by 2 with no remainder. Divisible by 5 means the number ends in 5 or 0. Since it is...

C = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19} Notice, we do not include 20 since it said less than, and not less than or equal to.