Question

Sarah began the school week with $2.60 in her lunch account. She deposited $20 on Monday, and then spent $4.75 each day that week for lunch. what equation was the balance in her lunch account on the end of the day on Friday?

Answer 1

Answer:

17.85

Step-by-step explanation:

2.60+20= 22.60

22.60-4.75= 17.85

Answer 2

Equations are used to find the unknown quantity.

• The equation which represents the total balance in Sarah lunch account on the end of the day on Friday i

        $x=22.6-19\\x=3.6$

• Thus the total balance in her lunch account on the end of the day on Friday is 3.6.

What is equality equation?

The equation which represents the equality between the two expressions. Equations are used to find the unknown numbers.

Given information-

Sarah began the school week with $2.60 in her lunch account.

The amount deposited by the Sarah is $20 on Monday,

The amount spent by the Sarah each day from Thursday to Friday is $4.75.

Suppose the total balance in her lunch account on the end of the day on Friday is $x$.

As the amount in her account was $2.60, when she began the school. The $20 was then deposited. Thus,

$x=2.60+20$

Now she spent $4.75 each day for the next four days. Thus,

$x=2.60+20-4(4.75)$

Hence this is the equation which represents the total balance in her lunch account on the end of the day on Friday.

Solve the equation,

$x=22.6-19\\x=3.6$

Thus the total balance in her lunch account on the end of the day on Friday is 3.6.

Hence,

• The equation which represents the total balance in her lunch account on the end of the day on Friday i

        $x=22.6-19\\x=3.6$

• Thus the total balance in her lunch account on the end of the day on Friday is 3.6.

Learn more about the equality equation here;

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