Answer:
B: 1/5
Step-by-step explanation:
If the lines are perpendicular, they have negative reciprocal slopes
s has a slope of -5
t must have a slope of - (1/ -5)
= 1/5
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The answer is d because 12c=20 = c=65/12 divide by both sides
20/10 is same as 20:10 so the whole number is 2