Arecipe calls for 2 2/4 cups but i have a 1/4 measuring cup how much do i need to measure out to 2 2/4

What is the value of this expression when b= 5 6 (2b-4)

News cameras take an overhead picture of a crowd at an outdoor event journalist then count the total number of people in the picture and use the sample of estimate the total number of people in the crowd this process is an example of

Find the greatest common factor of the followig monomials 21u^5v,3u^4v^6, and 3u^2v^5