What is the value of x in the equation x- 3/4 =5 1/6​

Express -5 2/5 as an improper fraction.

Maria has $11 to buy fish for her aquarium. each goldfish costs $2. how many goldfish can she buy? do not include units in your answer

In the expansion of (2m-3n)^9 one of the terms contains m^3. determine the exponent of n in this term