For x, y ∈ r, prove that ||x| − |y|| ≤ |x − y|, (hint: consider x = y + (x −

Janie has $3. she earns $1.20 for each chore she does and can do fractions of chores. she wants to earn enough money to buy a cd for $13.50. write an inequality to determine the number of chores, c, janie could do to have enough money to buy the cd.

If x-1 and x+3 are the factors of x3+10x2+ax+b find a and b

The area of the map is the product of the length and width. write and expression for the area as the product of the two binomials do not multiply