Roberto began his collection of trading cards when his grandfather presented him with a set of 18 cards. Each week, he added 5 cards to his collection. His collection grew by the sequence shown below.
18, 23, 28, 33, ..
How many cards did he have at the end of the 10th week?

A. 68
B. 58
C.72
D. 63

68

Step-by-step explanation:

if he got 5 cards each week, and there were 10 weeks, then you do 5*10=50

He started with 18, so you need to ad 18 to 50 (18+50=68)

attachment?

step-by-step explanation:

you could deduce the conclusion directly using the facts pertaining to the specific situation.

hope this .