Find an expression which represents the sum of (6x + 9y) and (7x – 4y) in simplest terms.

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A50% increase followed by 33 1/2% decrease

Select all the correct locations on the table. consider the following expression. 76.493 select "equivalent" or "not equivalent" to indicate whether the expression above is equivalent or not equivalent to the values or expressions in the last column equivalent not equivalent 343 equivalent not equivalent 49 78.498 78.498 75.493 equivalent not equivalent 75.7 equivalent not equivalent

Math i have no idea how to do a and b