4x+y=15
3x+5y=41
help please!

Step-by-step explanation:

x=2. y=7

4(2) + (7) =15

3(2) + 5(7) = 41

Step-by-step explanation:

4x+y=15 1

3x+5y=412

y=15–4x3

3 in 2

3x+5(15–4x)=41

3x+75–20x=41

3x–20x=41–75

-17x=-34

x=-34÷-17

x=2

x=2 in 1

4(2)+y=15

8+y=15

y=15–8

y=7

x=2,y=7

answer: b.48 for

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.