List all the subset of set
[ red, green, blue

red, green, blue, red green, blue green, red blue

Step-by-step explanation:

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We are given the Set: {Red, Green, Blue}

Number of Subsets of the Set:

Number of Subsets of a set is also known as the power of that set

The power of a set is denoted as: 2ⁿ (where n is the number of elements of the set)

Power of the given set:   2³ = 8 subsets

All the subsets of the Given set (The Power Set):

{ ∅, {Red}, {Green}, {Blue} , {Red, Green} , {Green, Blue}, {Blue, Red} , {Red, Green, Blue} }

mr. flanders’ class sold 47 doughnuts and   mr. rodriquez’s class sold 38 cartons of milk

step-by-step explanation:

let x be the number of doughnuts sold by mr. flanders’ class and y be the number of cartons sold by mr. rodriquez’s class.

1. together, the classes sold 85 items, then

x+y=85.

2. both classes earn earned $104.49 for their school. if doughnuts were sold for $1.35 each, then x doughnuts costed $1.35x. if cartons of milk were sold for $1.08 each, then y cartons costed $1.08y. hence,

1.35x+1.08y=104.49.

3. solve the system of two equations:

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.