Find the value of the expression if x = 2.1, z = -4.2 and b = -3.

|2x−z|+6b

This is a map of the mars exploration rover opportunity predicted landing site on mars. the scale is 1cm : 9.4km. what are the approximate measures of the actual length and width of the ellipse? i mostly need to know how to set it up : )

Maria solved an equation as shown below. what is the solution to maria’s equation?

The students in a class were asked how many siblings they have. the data obtained is represented in the dot plot. the number of students who have no siblings is . the number of students who have three or more siblings is .