When sam’s little brother was born, he was 18 inches tall. each year, he grows an average of 3 inches. sam’s brother continues this growth pattern. how many inches tall will he be after 9 years? (hint: create a table with an independent variable, x, and a dependent variable ,y)

45

Step-by-step explanation:

year 1 : 18 in

every year after that he grows 3 in so 3 in so 3x9=27

then 27+18=45

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.