raxy2832 raxy2832

16-12-2018
Mathematics

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if 3 x+4y =16 and 3x-4y=4 find xy. Please answer as soon as possible

Respuesta :

hmutlek hmutlek

16-12-2018

Answer:

5

Step-by-step explanation:

(4+4y)/3 = x 4+4y+4y = 4+8y=16 12=8y 12/8= 6/4 = 3/2 y= 1.5(4) = 6 +4 = 10

3x=10 10/3 = x x*y = 1.5 times 10/3 = 5

Answer Link

isabellaczarny isabellaczarny

18-12-2018

Answer:

x= 3.3

y=1.5

Step-by-step explanation:

Answer Link

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