Describe Cullen's mistake

Answer:Cullen did not add 4n to the -6n he added -4n.

Step-by-step explanation:When you go to move the -4n you want to add 4n to make the -4n turn to 0. This is because we need n on one side and what it is equaled to on the other.

2/5 divided by 1/4 as a fraction

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A mine worker discovers an ore sample containing 500 mg of radioactive material. It is discovered that the radioactive material has a half life of 1 day. Find the amount of radioactive material in the sample at the beginning of the 7th day.

What is 9 + 10 ____________________________________________

Which equation is parallel to:
y = -2x +2
Group of answer choices

y = 1/2x +7

y = -2x +5

y = -1/2x +3

y = 2x +6

Kiley and her parents traveled to visit her grandmother. They drove 24.3 miles from their house to the airport in hour. At the airport, they exited the car and walked for hour to the waiting area by the gate to board their plane. Their walk covered 1.2 miles. From the waiting area, they walked another 0.1 mile to board the plane. The plane left the gate 45 minutes after they arrived at the waiting area. The plane flew 346 miles in hours. After the plane landed, Kiley and her parents walked for 30 minutes, covering 1.1 miles, before they found a cab. It was a 15-minute cab ride to get to Kiley’s grandmother’s house, which was 12.3 miles away.
Answer the following questions about kileys trip. All questions are written in terms of an average rate. Assume that an average rate includes the time that kiley is at rest.
In this task you will write the ratio of miles to hours for each leg of kileys trip. You will then express the ratio as a decimal number. Next you will find the unit rate in miles per hour for each leg of the trip.

2. At the airport the walk from the car to the waiting area by the gate

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Use operations of decimal, fraction, and percent numbers to model the following scenarios. In your final answer, include only an equation or proportion modeling the scenario. Do not solve the problems.

A family dines in a popular franchise restaurant. At the end of the meal, they decide to leave their server a monetary tip that is equal to 20% of the total bill amount, $60.50. How much will the family leave their server as a tip?
A family dines in a popular franchise restaurant. They plan to use a coupon that will give them a discount of 15% off of their total dinner bill, not including applicable sales tax or their server’s tip. If the family’s dinner bill totaled $34.00 before tax and tip, how much money will they save by using the coupon?
A family dines in a popular franchise restaurant. They plan to use a coupon that will give them a discount of 10% off of their total dinner bill, not including applicable sales tax or their server’s tip. The bill totals $157.30 before tax and tip. What is the new total after the server applies the 10% off coupon?
A family of eight dines in a popular franchise restaurant. The restaurant has a policy of automatically including a standard tip to the final bill for parties larger than six people. The bill for the meal included a total of $58.25 in food and beverage sales, plus a standard tip of $10.49. What percent of the food and beverage sales does the restaurant consider to be a standard tip for parties larger than six?
A family dines in a popular franchise restaurant that has a policy of automatically including a 20% tip on all food and beverage sales before coupon discounts are applied. What is the family’s total bill amount if their food and beverages totaled $94.20 and they used a 15% off coupon? (HINT: Create more than one model.)

You deposit $575 into a savings account that earns 4.6% interest compounded annually. Find the new balance of the account after 4 years. Round your answer to the neartest cent.

You earned a simple interest of $375 after 30 years. If the account started with $500, what is the rate?

You deposit $575 into a savings account that earns 4.6% interest compounded annually. Find the new balance of the account after 4 years. Round your answer to the neatest cent.

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in this experiment, you will use a track and a toy car to explore the concept of movement. You will measure the time it takes the car to travel certain distances, and then complete some calculations. In the space below, write a scientific question that you will answer by doing this experiment.

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Between 3 and 5 seconds, the elevator was moving at a rate of

Write in slope intercept form
5x - 3y = -9
Group of answer choices

y = (5/3)x + 9

y = (5/3)x - 3

y = (3/5)x + 3

y = (5/3)x + 3

Evaluate the expression when x=20 and y=4.

8y−x =

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Solve the equation 3= d+2
Will give brainliest be quick plz

I just need 1 more reason for the black text. Thanks!

The table below shows the data for a random sample of fish that were collected from and later released into a lake:

Type of Fish Catfish Grass Carp Bluegill
Number of Fish 52 61 87
How many bluegills are estimated to be present if a sample of 800 fish is collected from the lake? (5 points)

Group of answer choices

148

174

244

348

Based on the context in paragraph 4, fossil refers to _____.

HELP I NEED RIGHT ANWSER QUICK!!!

How does the decimal point move when multiplying 79.816×103?

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John’s house is 12 miles away from school. He is two-thirds of the way home. How many miles has he walked?
A. 8
B. 16
C. 18
D. 24

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Screen-printing a batch of shirts requires 2 minutes per shirt in addition to 4 minutes of initial set-up time. If it takes 80 minutes to screen-print a batch of shirts, how many shirts are in the batch?

38

4

40

20