Doris is investigating if height has any effect on red blood cell count. what is the explanatory variable?

For what values of the variable x is the expression square root of 7x+14+ square root of 7-x a real number?

Which choice has the correct steps in graphing the solution set to the following inequality? -45_> 20x-5y

Will give brainliest for correct answer 8. use the distance time graph to answer these questions: a. what does the graph tell us about the velocity of the car? b. what is the average velocity of the car? (show work) c. is the velocity reflected in the graph positive or negative?d. is there any point on the graph where the car is not moving? how do we know?