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spayn [35]
3 years ago
13

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

w many will he have on day 20
Mathematics
2 answers:
Zinaida [17]3 years ago
6 0
Equation: Y=5x+25
X= 20days
Y=5(20)+25
Y=100+25
Y=125
Answer is 125cards
Nastasia [14]3 years ago
3 0

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.

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Farmer Brown has 42 animals, which are cows and chickens. They have a total of 120 legs. Write a system of equations, show your
SCORPION-xisa [38]

Answer:

The system of equations is:

x + y = 42

4x + 2y = 120

And there are 24 chickens.

Step-by-step explanation:

We know that the total number of cows (x) plus the total number of chickens (y) is 42, because Farmer Brown has 42 animals.

We also know that cows (x) have 4 legs and so 4 times the number of cows is the number of cow legs. And chickens (y) have 2 legs, so the number of chickens times two represents the total chicken legs. The sum of 4x + 2y is 120 because there are 120 legs in total.

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Subtract 4x from both sides

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