The bank gave jennifer $20 to start a savings account. Each month Jennifer added the same amount, $13. Which expression shows how much money Jennifer has after (m) number of months?
A. 20m
B. 20m+13
C. 20+13M
D. 13m*20
To find out how much money Jennifer has after (m) number of months, we need to consider the initial amount given by the bank and the monthly additions. Let's break it down:
Initial amount given by the bank: $20
Monthly addition: $13
To calculate the total amount after (m) number of months, we need to multiply the number of months by the monthly addition and add it to the initial amount:
Total amount = (Number of months) * (Monthly addition) + (Initial amount)
Now let's look at the answer choices:
A. 20m
This expression only accounts for the number of months, ignoring the monthly addition. This is not correct because we need to consider the additional $13 Jennifer adds each month.
B. 20m+13
This expression correctly accounts for the number of months (20m) and adds the additional $13 each month (+13). Therefore, this option is a possible answer.
C. 20+13M
This expression incorrectly multiplies the extra amount Jennifer adds each month (13) by the number of months (M) and adds the initial amount (20) separately. Therefore, this is not the correct expression.
D. 13m*20
This expression multiplies the monthly addition (13) by the number of months (m) and multiplies the result by the initial amount (20). This is not the correct calculation because we need to add the monthly additions, not multiply them.
Based on the explanations above, the correct expression is B. 20m+13.