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Answer:
3 miles
Step-by-step explanation:
y(x) = total minutes
y = total miles
x = the time in minutes it take erica to run a mile
4x = 56
x = 56/4
x = 14
so it takes her 14 minutes to run one mile
plug 14 into x
y(14) = 42
42/14 = 3 miles