Which number sentence below matches this word problem? Jen and Marcus got 15 miles up river before they ran out of gas. They floated 9 miles back down river before they reached the shore. How far did they get?
a.15 - 6 = 9
b.9 + 15 = 24
c.15 - 9 = 6
d.135 9 = 15
They flowed 15 miles UP. This is equivalent to a positive 15. Then 9 miles DOWN. This is equivalent to a negative 9. Now put these two numbers together. 15-9
