Can someone help me on this one?

A=15

B=13??

C=15

D=85

Step-by-step explanation:

B is the only one I'm not sure

A. 3/x = 20/100

x=15

B. 3/23 = x/100

300=23x

x=13

C. 3/20 = x/100

x=15

D.  17/x=20/100

x=85

Let me know if you have any other questions

a.   since the profit made in 2012 is equal to the profit made in 2014, the profit is symmetric about the line y = 120,000.

step-by-step explanation:

reduce the friction between its moving parts

step-by-step explanation:

in fact, by reducing the friction between the moving parts of the machine, it is possible to reduce the energy wasted due to this friction; therefore, more input energy is converted into useful work, and this will improve the efficiency of the machine.