The sum of two numbers, a and b, is 8.25. The difference between the two numbers is 0.75. Which equation can be used to determine the value of a? 2a = -9
2a = 7.5
2a = -7.5
2a = 9

Sample response: if the graph passes the horizontaline test, then the function is one to one. functions that are one to one have inverses that a therefore, the inverse is a hinction compare your response to the sample response above. what did you include in your explanation? a reference to the horizontal-line test d a statement that the function is one-to-one the conclusion that the inverse is a function done

Which exponential function has an initial value of 2? f(x) = 2(3x) f(x) = 3(2x)

The serenity and the mystic are sail boats. the serenity and the mystic start at the same point and travel away from each other in opposite directions. the serenity travels at 16 mph and the mystic travels at 19 mph. how far apart will they be in 3 hours?