What is 5.43+2.67 equal using front end estimation

The mean of a set of data is -3.82 and its standard deviation is 2.31. find the z score for a value of 3.99.

If 24 people have the flu out of 360 people, how many would have the flu out of 900. choose many ways you could use proportion that david would use to solve this problem

The triangles in the diagram are congruent. if mzf = 40°, mza = 80°, and mzg = 60°, what is mzb?