200 elementary school students were surveyed to find their blood groups. of those, 55 were of blood group a, 85 of blood group b, and 21 of blood group o. what is the probability that a randomly chosen student has either blood group a or blood group b? a) 0.25 eliminate b) 0.60 c) 0.70 d) 0.81

Which graph represents the equation y =4x

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

If angle b measures 25°, what is the approximate perimeter of the triangle below? 10.3 units 11.8 units 22.1 units 25.2 units