Basic Arithmetic : Linear Equations with Money

Study concepts, example questions & explanations for Basic Arithmetic

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Example Questions

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Example Question #1 :Linear Equations With Money

If Bobby makesan hour plus abonus a day, how much would Bobby make if he workshours today?

Possible Answers:

Correct answer:

Explanation:

1. Find the equation from this scenario:

因为鲍比让12美元一个小时,你知道你的slope is 12 because his total pay will be the $12 multiplied by the number of hours he worked.

Add the $5 daily bonus Bobby makes, which is your y-intercept in this equation.

Total = $12(hours) + $5

2. Find his total pay for 5 hours using the above equation:

$65

Example Question #1 :Linear Equations With Money

Tom makesa day,days a week. If his rent every four weeks was, what is his overall net profit?

Possible Answers:

Correct answer:

Explanation:

We can determine Tom's weekly income by multiplying $50 into the 5 days he worked.

Tom makes $250 a week.

In four weeks, Tom makes $1000.

因为房租是1000美元每四个星期,你好s net income is zero.

Example Question #1 :Linear Equations With Money

You loan a friendat aannual simple interest rate. After how many years will he owe youjust in interest?

Possible Answers:

years

years

years

years

year

Correct answer:

year

Explanation:

This is a simple interest rate problem, for which we use the formula:

Interest = P x r x t

P is the principal, or original loan amount; r is the annual interest rate; and t is the number of years in question.

In this problem we are given the interest ($100); the principal ($2,000); the interest rate (5%). We are asked to find t, the time in years it takes for $100 of interest to accumulate. We plug all these values into the formula and solve for t:

t is equal to 1 year. It will take 1 year for $100 of interest to accumulate.

Example Question #1 :Linear Equations With Money

A lollipop costs.安妮已经dollars. What is the maximum number of lollipops Anne can buy? How much money does she have left over (round to the nearest whole cent)?

Possible Answers:

lollipops withleft over.

lollipops withleft over.

lollipops withleft over.

lollipops withleft over.

lollipops withleft over.

Correct answer:

lollipops withleft over.

Explanation:

To solve this problem, first you need to create a linear equation:

Divide both sides by:

Now, Anne can't buy .462 lollipops, so you round off toNow you must calculate the money left over:

So, Anne boughtlollipops and she hasleft over.

Example Question #1 :Linear Equations With Money

Jim makesper hour. If he workshours per day fordays, how much money will he earn?

Possible Answers:

Correct answer:

Explanation:

Create a linear equation to find your answer:

Since Jim makes 12 dollars per hour we can multiply 12 by the number of hours he worked. We then can multiply that number by the number of days he worked to get the total money earned.

Convert back into dollars, so you have

Example Question #1 :Linear Equations With Money

Mark has taken his car down to his local car wash. There, he can wash his car for每分钟,干他的车在end of the wash for a flatfee. If Mark only hasto spend on a car wash, for how long can he wash his car?

Possible Answers:

minutes

minutes

minutes

minutes

minutes.

Correct answer:

minutes.

Explanation:

找出多少分钟可以洗c标志ar, we must understand the relationship between the total cost of a car wash and the length of the car wash.

With every car wash, a fee ofis needed to dry the vehicle, so Mark will only haveremaining to spend on washing his car. If it costsper minute to wash his car, we merely need to dividebyto determine the number of minutes that Mark can wash his car:

Therefore, with Mark's, he can wash his car forminutes.

Example Question #1 :Linear Equations With Money

Jamie makes $60 a day, 5 days a week. If her rent is $300 every 4 weeks, what is her net profit in 4 weeks?

Possible Answers:

Correct answer:

Explanation:

In 4 weeks, Jamie will automatically be spending $300 on rent, so we will subtract this amount from whatever income Jamie makes.

In order to calculate her income, we will multiply $60 by 5, which equals $300.

Jamie makes $300 a week.

Then we will multiply this number by 4, since we are finding her net profit over 4 weeks. $300 times 4 equals $1200.

Lastly, we subtract her rent payment ($300) from her $1200 income, making her net profit $900.

Example Question #1 :Linear Equations With Money

Samuel bakes cakes and earns $5 profit from each cake. This week, he made 25 cakes. One cake was so beautiful, that the customer tipped Samuel an extra $25. How much money did Samuel earn this week?

Possible Answers:

Correct answer:

Explanation:

To calculate how much money Samuel made this week, we will multiply how many cakes he made with how much profit he earns per cake. This week, Samuel made 25 cakes at $5 profit per cake, so we will multiply 25 by $5, which equals $125.

On top of this, we will add the $25 tip given to Samuel, which comes to a grand total of $150 earned this week.

Example Question #1 :Linear Equations With Money

It costs $8 to enter the carnival, and then each ride costs $2 to ride. Landry only has time to ride 4 rides. How much money does he spend at the carnival?

Possible Answers:

Correct answer:

Explanation:

Landry rides 4 rides at the carnival, which cost $2 each. To determine their total cost, we will multiply 4 by $2, which equals $8.

Then we need to add the initial cost of entering the carnival, which is also $8. Adding these together, we find that Landry spent $16 at the carnival.

Example Question #1 :Linear Equations With Money

Bill receives a monthly stipend of $500. He also works a part-time job, earning $30 a day. This month, he worked 10 days. How much money did he receive this month?

Possible Answers:

Correct answer:

Explanation:

首先,我们要确定这个星期一比尔的收入th, independent of his stipend. We calculate his income by multiplying $30 by how many days he worked in a month. In this case, he worked 10 days. Therefore, we multiply $30 by 10, which equals $300.

Since Bill also has a consistent monthly stipend of $500, we add his income of $300 to his stipend of $500, which totals $800.

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