Answer:
Step-by-step explanation:
A:
-mk - 90 > 85
-mk - 90 + 90 > 85 + 90
-mk > 175
-mk / k > 175 / k
-m > 175/k
-m * -1 < 175/k * -1
m < -175/k
Part B:
3c - 5f = 55
3c - 5f - 3c = 55 - 3c
-5f = 55 - 3c
-5f/5 = (55 - 3c) / 5
-f = 55/5 - 3c/5
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(1,1) and (-2,-11) are the correct solutions
30.55% increase
Hope this helps!