Addison and Alexa find ½ + ⅙. Addison says the sum is 4/6. Alexa says the sum is ⅔. Who is correct? Explain your reasoning.

Determine whether the set of whole numbers is closed under addition. explain why the set is or is not closed. give an example.

In two or more complete sentences, formulate how to use technology to calculate the appropriate regression model for the given data. you are not required to find the model, just choose the appropriate regression and explain how to use the technology. (-5,,2.,0.8), (0,-0.5), (2,-1.3), (3,-0.8), (5,2)

In trapezoid abcd, ac is a diagonal and ∠abc≅∠acd. find ac if the lengths of the bases bc and ad are 12m and 27m respectively.