2. Determine whether each set is well-defined. a) {x\ x is a real number}
b) {x| x is a good worker}
c) {x| x is a counting number less than 2}
d) {1, -3, 5, -7, 9, -11, ...}

Jace wrote a sentence as an equation. 56 is 14 more than a number. 14+ = 56 which statement best describes jace's work? jace is not correct. the phrase more than suggests using the symbol > and jace did not use that symbol. jace is not correct. he was correct to use addition, but the equation should be 56+ p = 14 jace is not correct. the first number in the sentence is 56, so the equation should start with 56. jace is correct. the phrase more than suggests addition, so jace showed that 14 plus a variable equals 56. o

Find an equation of the line perpendicular to the graph of 28x-7y=9 that passes through the point at (4,1)

Seymour is twice as old as cassandra. if 16 is added to cassandra’s age and 16 is subtracted from seymour’s age, their ages become equal. what are their present ages? show !