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Question

3. When solving the system of equations 6x + 2y = –1 and –x + 10y = 5 by Cramer's Rule, what are the values of D, Dx, and Dy?

A.D=58,D =20,D =–28 xy

B.D=62,Dx =20,Dy =28 C.D=58,D =–20,D =–29

xy D.D=62,Dx =–20,Dy =29 

Answer 1

???????????? kramers rule ?????????

???????? wotz all the d stuf ?????????

line 1: 6x +2y=-1...or 2y=-6x-1, so 10y=-30x-5

line 2: -x+10y=5 so -x -30x-5=5...-31x=10, so x=-10/31...x=-0.3225806451613

line 1+line2...(6x-6x)+(10y+60y)=(30-1)

70y=29, so y=29/70=0.414285714285728572857...