babanne
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The expression 3.5d + 5 represents the number of miles Erin ran last week when she ran 5 miles on Sunday and 3.5 miles each day after Sunday. The expression 2.5d + 3 represents the number of miles Luis ran last week when he ran 3 miles on Sunday and 2.5 miles each day after Sunday.

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abzinser

Answer:

I am assuming the question how many miles did they run last week so.

Step-by-step explanation:

d=6(because sunday was 5 miles we don't count that)

3.5*6=21

21+5=26

Erin ran 26 miles last week.

d=6(because sunday was 3 miles we don't count that)

2.5*3=7.5

7.5+3=10.5

Luis ran 10.5 miles

In case the question was how many more miles did Erin run than Luis it would be, Erin ran 15.5 more miles than Luis.

Hope this helps.

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