20 points if you solve!

question 1

solve by the linear combination method.

8x + 2y = 4
–4x + 3y = –10

(1, 3)

(2, 3)

(1, 2)

(1, –2)

question 2

solve by the linear combination method.

2x + 3y = –17
5x + 2y = –4

(3, –1)

(–2, 2)

(–1, 3)

(2, –7)

question 3

solve by the linear combination method.

3x – 5y = 7
2x + 3y = 30

(3, –7)

(3, 7)

(9, 4)

(–3, –7)

question 4

solve by the linear combination method.

x + y = 50
0.05x + 0.06y = 2.8

(20, 30)

(40, 60)

(10, 30)

(20, –50)

question 5

solve by the linear combination method.

6x – 2y = 2
–3x + 4y = 5

(1, 3)

(1, –2)

(2, 3)

(1, 2)

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.

i would be happy to . most people on would also love to i'm sure. if you just want someone who has done algebra before and want a little more personal relationship than just begging strangers for , i can certainly be of service. i do have college myself so i might not be 24/7.