It is 9: 00 a. m. when the math lesson starts, and it lasts for 55 minutes. what time will it be when the math lesson ends?

Just as a side note (as you do not need it for this question), an hour = 60 minutes, not 100 minutes.

Math lessons start at 9:00 A.M., and lasts for 55 minutes. Add 0:55 to 9:00

9:00 + 0:55 = 9:55

9:55 A.M. is when math lessons end.

hope this helps

if you explain the the question more correctly i might be able to answer this better

step-by-step explanation:

i think it would be 42cm