Answer:
C. 2/5 full
Step-by-step explanation:
y · 1 = 1/15 · 6
y = 0.4
18 - (-f) = 91
Subtracting a negative value changes to addition:
18 + f = 91
Subtract 18 from both sides:
F = 73
x∈{-7√2, 7√2}
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