The mean of a set of four numbers is 3.5. if a fifth number, x, is added to the data set the mean becomes 4. what is the value of x.

The weight of an object in the water is 7% of its weight out of the water. what is the weight of a 652g object in the water?

The average length of a king cobra is 3.7 m. the record length is 1.88 m longer than the average. how long is the record holder?

Aline passes through the points (5,4) and (2.1). part a.) what is the slope of the line that passes through these points? show work. part b.) what is the equation of the line that passes through these points. show work. part c.) where does the line intercept on the x& y axis? show work