- Uses of paper chromatography?

Discover Questions

3a - 4b = 7 2a - 3b = 6 Based on the equations, which of the following equations are true. A) b= a+1 B) b= a-1 C) b= -a + 1 D) -a - 1? What are some ways to demonstrate the density property of the real numbers? How would i set up this problem? In an xy plane, a line contains (4,n) (n,8), and (2,4). what is a possible value of n?
A) 2
B) 4
C) 6
D) 8? How many different 4-digit numbers can be formed using the digits 2, 4, 5, 6, and 7 so that no digits repeat & the number is divisible by 4?