X=7 because 7+6=13 and 3•13=39
13. If Molly rides twelve miles and there is a marker at each mile, that means that she would have passed 12 markers if she passed one at the end of each mile. However, since there are markers at the start and end, there are 13 markers.
Answer:
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Answer:
2/4
Step-by-step explanation:
Change the 2 1/2 to 2 2/4
now subtract 1/4 from 2 2/4 leaving 2 1/4
Now subtract 1 3/4 from 2 1/4 in which you get 2/4
which is the answer :)