Stephanie sells 12 pretzels per hour. Robert sells 15 pretzels per hour. This week, Robert sold an additional 18 pretzels. Which of the following expressions represents the total sales of both people this week, where S represents the number of hours that Stephanie worked and R represents the number of hours that Robert worked?

A. 12S + 15R + 18

B. 15S + 12R +18

C. 12S + 18R

D. 12S + 15R

11 answers

To find the expression that represents the total sales of both Stephanie and Robert this week, we need to consider the number of pretzels each person sold based on the number of hours they worked.

  1. Stephanie's sales:

    • She sells 12 pretzels per hour, and if she worked for \( S \) hours, then the total sales by Stephanie is \( 12S \).
  2. Robert's sales:

    • He sells 15 pretzels per hour, and if he worked for \( R \) hours, then his total sales would be \( 15R \).
    • Additionally, Robert sold an extra 18 pretzels this week.

To find the total sales, we add Stephanie's and Robert's sales together:

\[ \text{Total Sales} = \text{Sales by Stephanie} + \text{Sales by Robert} + \text{Additional Sales by Robert} \] \[ \text{Total Sales} = 12S + 15R + 18 \]

So the expression that represents the total sales of both people this week is:

A. \( 12S + 15R + 18 \)

Kayla is purchasing 5 candles for x dollars each and 5 candle holders for $3.50 each. Kayla paid a total of $27.50. Before tax, what is the cost per candle?

A.
$2.00

B.
$4.80

C.
$6.20

D.
$9.00

To find the cost per candle, we first need to set up an equation based on the given information.

  1. Candles: Kayla is purchasing 5 candles for \( x \) dollars each. Therefore, the total cost for the candles is: \[ 5x \]

  2. Candle holders: She is purchasing 5 candle holders for $3.50 each. Therefore, the total cost for the candle holders is: \[ 5 \times 3.50 = 17.50 \]

  3. Total cost: According to the problem, the total amount spent is $27.50. Therefore, we can set up the equation: \[ 5x + 17.50 = 27.50 \]

  4. Solving for \( x \):

    • First, subtract 17.50 from both sides: \[ 5x = 27.50 - 17.50 \] \[ 5x = 10.00 \]

    • Next, divide by 5: \[ x = \frac{10.00}{5} = 2.00 \]

Thus, the cost per candle is $2.00.

So, the correct answer is:

A. $2.00

Out of the 32 students in Mr. Martin's class, 18 are boys. If this ratio is proportional to the ratio of students in the school and the number of boys in the school, which of the following proportions would best be used to find the number of students in the school? It is given that there are 468 boys in the school.
A. 18/32 = s/468

B. 32/18 = s/468

C. 468/32 = s/18

D. 32/s = 18/468

To find the total number of students in the school based on the information provided, we can set up a proportion that compares the ratio of boys to the total number of students in Mr. Martin's class to the ratio of boys to the total number of students in the school.

From Mr. Martin's class:

  • Number of boys = 18
  • Total students = 32

From the school:

  • Number of boys = 468
  • Let \( s \) be the total number of students in the school.

We want to set up the proportion: \[ \frac{\text{Number of boys in class}}{\text{Total students in class}} = \frac{\text{Number of boys in school}}{\text{Total students in school}} \]

This can be expressed as: \[ \frac{18}{32} = \frac{468}{s} \]

Thus, the correct proportion to find the number of students in the school is:

A. \( \frac{18}{32} = \frac{s}{468} \)

This option sets up the proper relationship between the number of boys and total students for both the class and the school.

The cost of a concert ticket last week was $60.00. This week a concert ticket is $75.00. What is the percent increase of the ticket from last week to this week?
A.
8%

B.
15%

C.
20%

D.
25%

To calculate the percent increase in the cost of the concert ticket from last week to this week, you can use the formula for percent increase:

\[ \text{Percent Increase} = \frac{\text{New Value} - \text{Old Value}}{\text{Old Value}} \times 100% \]

In this case:

  • Old Value (last week's ticket price) = $60.00
  • New Value (this week's ticket price) = $75.00

Now, plug the values into the formula:

\[ \text{Percent Increase} = \frac{75 - 60}{60} \times 100% \]

Calculate the difference:

\[ = \frac{15}{60} \times 100% \]

Now, divide 15 by 60:

\[ = 0.25 \]

Finally, multiply by 100%:

\[ = 0.25 \times 100% = 25% \]

Thus, the percent increase of the ticket from last week to this week is 25%.

So the correct answer is:

D. 25%

Molly's family has $3,000 set aside for an upcoming vacation. The family plans to spend

of this amount on gasoline for the drive and motel rooms along the way and

of the remainder on meals. How much does Molly's family plan to spend on meals?

A.
$600

B.
$900

C.
$1,200

D.
$1,500

To determine how much Molly's family plans to spend on meals, we will need to break down the total amount they have set aside and apply the spending proportions for gasoline, motel rooms, and meals.

Since the problem does not specify the proportions to be spent on gasoline and motel rooms, I will assume you meant to indicate a fraction for each that might look something like "x of this amount on gasoline and y of the remainder on meals."

Let’s consider two hypothetical fractions for example:

  • Let's say they plan to spend \( \frac{1}{4} \) of the amount on gasoline and motel rooms combined.
  • After that, they may spend \( \frac{2}{3} \) of the remainder on meals.

Step 1: Calculate the amount spent on gasoline and motel rooms.

If they spend \( \frac{1}{4} \) of $3,000 on gasoline and motel rooms: \[ \text{Gas and Rooms} = \frac{1}{4} \times 3000 = 750 \]

Step 2: Calculate the remainder.

Subtract the gasoline and motel expenses from the total: \[ \text{Remainder} = 3000 - 750 = 2250 \]

Step 3: Calculate the amount spent on meals.

If they spend \( \frac{2}{3} \) of the remainder on meals: \[ \text{Meals} = \frac{2}{3} \times 2250 = 1500 \]

In this hypothetical scenario, Molly's family plans to spend $1,500 on meals.

Since your prompt did not include the specific fractions, I encourage you to employ the above logic with the exact fractions you have in mind to determine the total amount spent on meals. However, if you follow the example given, based on the assumption that Molly's family spends these fractions, the closest answer according to the options would be:

D. $1,500

If the fractions were different, please provide those specifics, and I can update the calculations accordingly.

Jessica chose a fruit cup and a salad as the side dishes with her lunch every day for 15 days.

Each fruit cup cost $0.75
Each salad cost $1.50
What was the total cost of Jessica’s side dishes for 15 days?

A.
$11.25

B.
$17.25

C.
$22.50

D.
$33.75

To find the total cost of Jessica's side dishes for 15 days, we need to calculate the daily cost of her chosen side dishes (fruit cup and salad) and then multiply that by the number of days (15).

  1. Cost of a fruit cup: $0.75
  2. Cost of a salad: $1.50

Step 1: Calculate the total cost for one day: \[ \text{Total cost per day} = \text{Cost of fruit cup} + \text{Cost of salad} \] \[ \text{Total cost per day} = 0.75 + 1.50 = 2.25 \]

Step 2: Calculate the total cost for 15 days: \[ \text{Total cost for 15 days} = \text{Total cost per day} \times 15 \] \[ \text{Total cost for 15 days} = 2.25 \times 15 = 33.75 \]

Thus, the total cost of Jessica’s side dishes for 15 days is $33.75.

So the correct answer is:

D. $33.75