The equation of line a is y= -8/5x + 4/3 line b is perpendicular to a what is th slope of line b

The slope of line b is  

Step-by-step explanation:

∵ The equation of line a is y = x +

→ Compare it with the form of the equation above to find m

∴ m =

∴ The slope of the line a is  

∵ Line b is perpendicular to line h

∴ The product of their slopes = -1

→ To find the slope of b reciprocal the slope of line a and change its sign

∵ The reciprocal of and opposite sign of   is

∴ The slope of line b is  

To check your answer multiply the slopes they must give you -1

∵  ×    = -1

∴ The answer is correct

he spend 5.1 minutes chatting with his friends

step-by-step explanation:

2/5+1/2=9/10

6/1-9/10=5 1/10

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.