Question

everyday luis buys 5 more baseball cards to add to his collection . if he has 25 baseball cards before making any purchases , how many will he have on day 20

Answer 1

Equation: Y=5x+25
X= 20days
Y=5(20)+25
Y=100+25
Y=125
Answer is 125cards

Answer 2

Answer:

On the 20th day he will have 125 baseball cards.

Step-by-step explanation:

We are given a statement that:

Everyday luis buys 5 more baseball cards to add to his collection . if he has 25 baseball cards before making any purchases.

We are asked to find  how many will he have on day 20?

Let $P_n$ denotes the number of  baseballs cards on nth day.

on the first day he will have:

$P_1=25+5$

on second day he has:

$P_2=P_1+5=25+5\times 2$

On third day he will have:

$P_3=P_2+5=25+5\times 3$

and so on on the nth day he will have:

$P_n=25+5\times n$

We are asked to find the number of baseball cards on 20th day.

i.e. n=20

$P_{20}=25+5\times 20\\\\P_{20}=25+100\\\\P_{20}=125$

Hence, on the 20th day he will have 125 baseball cards.