Hey!
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We know that (a = -3), (b = 2), (c = 5), and (d = -4)
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Question 6:
= 5ac - 2b
= 5(-3)(5) - 2(2)
= 5(-15) - 4
= -75 - 4
= -79
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Question 7:
= ab/d
= (-3)(2)/-4
= -6/-4
= 1 1/2
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Hope this helped, good luck!