36b-45-18b=9( b- ) help me

The price of a coat increased from $78 to $92. what is the price increase percentage?

Mexico city, mexico, is the world's second largest metropolis and is also one of its fastest-growing cities with a projected growth rate of 3.2% per year. its population in 1991 was 20,899,000 people. use the formula p = 20.899e0.032t to predict its population p in millions with t equal to the number of years after 1991. what is the predicted population to the nearest thousand of mexico city for the year 2010?

The sum of the reciprocal of a positive number and the reciprocal of 2 more than the number is 3/4 equation: the number is