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Hector had \(y\) dollars in his savings account. He made a deposit of twenty- dollar bills and dollar coins. He had four times as many dollar coins as he had twenty-dollar bills and the total of his twenty-dollar bills was \(\$ 60 .\) Write an expression for the balance in Hector's account after the deposit.

Short Answer

Expert verified
The balance in Hector's account after the deposit is \(y + \$72\).

Step by step solution

01

Determine the Number of Twenty-Dollar Bills

Since the total amount of his twenty-dollar bills is \$60, we can find the number of bills by dividing the total amount by the value of each bill. Each twenty-dollar bills is worth \$20, so \[ \text{{Number of Twenty-Dollar Bills}} = \frac{\$60}{\$20} = 3 \]
02

Find the Number of Dollar Coins

It was mentioned that he had four times as many dollar coins as twenty-dollar bills. Multiplying the number of twenty-dollar bills by 4 gives us the number of dollar coins. So, \[ \text{{Number of Dollar Coins}} = 4 * \text{{Number of Twenty-Dollar Bills}} = 4 * 3 = 12 \]
03

Compute the Total Deposit

The total deposit is the sum of the value of all twenty-dollar bills and dollar coins. Hence, \[ \text{{Total Deposit}} = \text{{Number of Twenty-Dollar Bills}} * \$20 + \text{{Number of Dollar Coins}} * \$1 = 3 * \$20 + 12 * \$1 = \$60 + \$12 = \$72 \]
04

Write the Expression for the Balance

Now that we have the total deposit, we can find the balance in the account after the deposit. This is given by the initial amount (\(y\)) plus the total deposit. So, \[ \text{{Balance After Deposit}} = y + \text{{Total Deposit}} = y + \$72 \]

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Key Concepts

These are the key concepts you need to understand to accurately answer the question.

Financial Literacy
Financial literacy is an essential skill that involves understanding how money works in the real world. It includes knowing how to manage, invest, and save money effectively. When we talk about financial literacy in an algebraic context, we're understanding mathematical concepts within practical scenarios, like bank accounts or budgeting.
A key component is recognizing different types of financial moves, like making deposits or understanding interest rates. Hector gives us an example here. By calculating his total deposits, Hector demonstrates how knowledge of financial arithmetic can guide sound financial decisions.
  • Understanding deposits and withdrawals helps us keep track of our funds.
  • Using simple math skills to monitor savings is an important part of managing personal finances.
  • Algebraic expressions can simplify financial calculations.
Managing finances well often requires a mixture of mathematical reasoning and logical decision-making, both of which support a solid foundation in financial literacy.
Savings Account
A savings account is a bank account where money is deposited, stored, and can accumulate over time. It's a fundamental building block in personal finance, useful for setting aside funds and earning interest over the long run.
In Hector's situation, we learn about making deposits to his savings account. Deposits increase the account balance and can involve cash, checks, or electronic transfers.
  • Deposits increase the balance and potentially earn interest, depending on bank policies.
  • Saving regularly can lead to a substantial amount over time thanks to compound interest.
  • Understanding deposits aids in making stronger financial decisions with savings accounts.
Algebra helps us express changes in the account, allowing us to visualize how each action, like Hector's deposit, affects the balance. This helps foster a disciplined approach to savings.
Problem-Solving Skills
Problem-solving skills help us tackle everyday challenges with confidence and creativity. When it comes to math problems, like Hector’s, these skills enable us to break down complex situations into manageable steps, leading to a solution. Through the exercise, we can engage various problem-solving strategies:
  • Identifying and understanding the problem.
  • Breaking it into clear, sequential steps, such as determining the number of items (bills, coins).
  • Logical reasoning to compute totals and forming an expression.
The structured approach used in the solution can be applied to countless scenarios beyond math. By identifying key elements, making calculations, and ultimately simplifying results into a final expression, we flex problem-solving muscles critical for both academic and real-world situations.
Mathematical Reasoning
Mathematical reasoning involves using logic and mathematics to solve problems. It's about understanding relationships between numbers and operations to form conclusions. In Hector's exercise, we observe mathematical reasoning in action through algebra.
We calculated how many twenty-dollar bills Hector had by dividing the total ( $60 ) by the value per bill ( $20 ), a logic-based calculation. This extends to finding the number of dollar coins by leveraging the relationship between the numbers. In this exercise:
  • Algebraic expressions model real-life situations, helping visualize financial scenarios.
  • Developing reasoning skills encourages a deeper understanding of mathematical concepts.
  • They allow for efficient problem-solving by predicting outcomes and verifying results.
Mathematical reasoning not only frames our thinking around numbers but also enables practical application, demonstrating the power of algebra in everyday life.

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Most popular questions from this chapter

Janine is 21 years old. She opens an account that pays 4.4\(\%\) interest, compounded monthly. She sets a goal of saving \(\$ 10,000\) by the time she is 24 years old. How much must she deposit each month?

Ryan deposits \(\$ 775\) in an account that pays 4.24\(\%\) simple interest for four years. Brian deposits \(\$ 775\) in an account that pays 4.24\(\%\) simple interest for one year. a. What is Ryan’s interest after the four years? b. What is Ryan’s balance after four years? c. How much interest did Ryan’s account earn the first year? d. How much interest did Ryan’s account earn the fourth year? e. What is Brian’s interest after the first year? f. What is Brian’s balance after the first year? g. Suppose Brian withdraws all of the principal and interest after the first year and deposits it into another one-year account at the same rate, what is his interest for the second year? Round to the nearest cent. h. Compare the interest Brian earns with the interest Ryan earns for the second year. Who earned more interest? Explain.

Bob wants \(\$ 50,000\) at the end of 7 years in order to buy a car. If his bank pays 4.2\(\%\) interest, compounded annually, how much must he deposit each year in order to reach his goal?

Donna has a checking account that charges \(\$ 0.15\) for each check written and a monthly service charge of \(\$ 9.75 .\) Write a formula that Donna can use each month to find the will be charged. Identify any variable you use in the formula.

John, Paul, and George are having a disagreement over interest rates. John says that 6\(\frac{3}{4} \%\) can be expressed as 6.75\(\%\) . George thinks that 6\(\frac{3}{4}\) can be expressed as \(0.0675 .\) paul remembers converting percents to equivalent decimals and thinks it can be expressed as 0.0675\(\% .\) Who is correct, and who is incorrect? Explain.

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