a. Suppose I have two personal debts, a $100 debt with a relative and a $50 debt with a friend. Demonstrate how to calculate your total debt by adding signed numbers. b. Suppose you have a checking account with a bank that allows you to keep a negative balance when your withdrawals (money taken out) are greater than the amount you currently have in your account. Your current balance is $25, but a $40 withdrawal has just occurred. Demonstrate how to calculate your new balance by adding signed numbers. C. Now suppose your current balance is -15 dollars and a $20 wvithdrawal occurs. Demonstrate how to calculate your new balance by adding signed numbers.
Unitary Method
The word “unitary” comes from the word “unit”, which means a single and complete entity. In this method, we find the value of a unit product from the given number of products, and then we solve for the other number of products.
Speed, Time, and Distance
Imagine you and 3 of your friends are planning to go to the playground at 6 in the evening. Your house is one mile away from the playground and one of your friends named Jim must start at 5 pm to reach the playground by walk. The other two friends are 3 miles away.
Profit and Loss
The amount earned or lost on the sale of one or more items is referred to as the profit or loss on that item.
Units and Measurements
Measurements and comparisons are the foundation of science and engineering. We, therefore, need rules that tell us how things are measured and compared. For these measurements and comparisons, we perform certain experiments, and we will need the experiments to set up the devices.

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