It's B because 5 x 4 = 20 and 9 x 5 = 45
When you add them together you get 65
2(z-10)=-4
2z-20=-4
2z=16
z=8
Foil the equation; j*k, j*-5, 7*k, 7*-5, once you foil add like terms.
jk - 5j +7k - 35 is the final answer
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