Bobby swims 3 laps every day during the summer. It takes him 15 seconds to swim from the ladder to the swimming lane, and he swims for a total of 135 seconds. The expression below can be used to find s, the number of seconds it takes Bobby to swim each lap.
135 = 3s + 15
How long does it take Bobby to swim each lap?
6 answers
What answer do you get?
360
is that correct
No.
135 = 3s + 15
Subtract 15 from both sides.
120 = 3s
Divide both sides by 3.
120/3 = s
? = s
135 = 3s + 15
Subtract 15 from both sides.
120 = 3s
Divide both sides by 3.
120/3 = s
? = s
40=s
thank you
3 answers