Which of the following polynomials is the expansion of (1/2x - y)^4

What is the solution to the equation? k/6.4=8.7 2.3 5.568 15.1 55.68

The scatterplot below shows the number of hours that students read weekly and the number of hours that they spend on chores weekly. which statement about the scatterplot is true?

Xy x xy if a and b are positive integers such that a*b=9 and b*a=72 what is the value of a/b