If Karen had 6 apples and ate 3 how many apples does she have left?

3 apples

Step-by-step explanation:

3 karen has 3 apples left

Step-by-step explanation:

6-3=3

3+3=6

I HoPe ThIs HeLpS

93.8

step-by-step explanation:

lets say, first number = x

second number = 3x+7

total = 49

(x)+(3x+7)= 49

4x+7 = 49

4x = 42

x = 42/4

x= 10.5

x= 10.5

3x+7 = 3(10.5)+7 = 93.8

hope this

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.