Eva spent $11.61 downloading songs, each song cost $1.29. four students wrote and solved equations to find s, the number of songs that she downloaded. which student wrote and solved the equation correctly?
a. seba’s work
1.29s=$11.61
s=10
b. ari’s work
$1.29s=$11.61
s=9
c. erick’s work
s/$1.29=11.61
s=14.98
d. daniel’s work
s/$1.29=$11.61
s=9