Question

please do this fast...... its super urgent......​

Answer 1

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Step-by-step explanation:

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Answer 2

20> x+y= 12   xy= 27   x³+y³=?

(x+y)³=12³

x³+y³+3xy(x+y) = 1728

x³+y³+3*27*12 = 1728

x³+y³+972 = 1728

x³+y³ = 1728-972

x³+y³= 756

21>  (x+1)/3-(x+7)/2 = 1

    (2(x+1)-3(x+7))/6 = 1

      2x-3x+2-21 = 6

      -x = 6+19

       x = 25

22> x=2   y=1

equation : 2x+3y = k

                  2*2+3*1 = k

                   4+3=k

                      k = 7