Answer:

Step-by-step explanation:
hello,
we can write

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Distance southward = 6x = 400, so x=66.66
total distance = 7x+x=8x = 533.33m
Supplementary angles add up to 180°
Angle y is the large angle: y= 5x+6
180= x+y
180= (5x+6) + x
180=6x+6
174=6x
x=29
180= y+29
y=151°
Answer: -6
Step by step:
2x + 3(8) = 12
2x + 24 = 12
2x = -12
x = -6
Answer:
decreasing, then increasing