Add or subtract as indicated

5/x+1 + 6/x-1 - 10/x^2-1

a. 5x/x^2-1

b. 11x-9/x^2-1

c. 5x-4/x^2+1

d. x+1/x^2-1

Apublic library wants to place 4 magazines and 9 books on each display shelf. the expression 4s+9s represents the total number of items that will be displayed on s shelves. simplify the expression

Weekly wages at a certain factory are normally distributed with a mean of $400 and a standard deviation of $50. find the probability that a worker selected at random makes between $450 and $500

Drag the tiles to the correct boxes to complete the pairs. using the properties of integer exponents, match each expression with the correct equivalent expression.