If a/x + 1 = c/x which is an expression for x terms in terms of c and a?

Each cookie sells for $0.50 sam spent $90 on baking supplies and each cookie cost $0.25 to make how many cookies does sam need to sell before making a profit formula: sales> cost

Find cot x if sin x cot x csc x = √2

Use pascal's triangle to find the missing values. x4 - 4xb + 6x2 - ax + 1