Question

calcule e complete os pares ordenados 60 pontos

Answer 1

Respostas:

a)...2x + 5y = 16.......x = 3....=> 2.3 + 5y = 16

..........................................................6 + 5y = 16

..........................................................5y = 16 - 6 = 10......=> y = 2

PAR ORDENADO:.....(3,...2)

b)...2x + 5y = 16....=> y = 3......=> 2x + 5.3 = 16

................................................................2x + 15 = 16

................................................................2x = 16 - 15

................................................................2x = 1...............=> x = 0,5

PAR ORDENADO:....(0,5; 3)

c)...3x - y = 1.......=> y = - 1.......=> 3x - (- 1) = 1

................................................................3x + 1 = 1

.................................................................3x = 1 - 1

..................................................................3x = 0...............=> x = 0

PAR ORDENADO:..(0, - 1)

d)....3x - y = 1......=> x = - 1.......=> 3.(- 1) - y = 1

..............................................................- 3 - y = 1

..............................................................- y = 1 + 3

............................................................. - y = 4.........=> y = - 4

PAR ORDENADO:.....(- 1, - 4)