1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
timurjin [86]
3 years ago
11

Ricardo took the following steps to simplify the expression below but was surprised to hear that his answer was incorrect. Which

of the following best describes Ricardo's mistake?
2x+3x(x-3)-4
Mathematics
1 answer:
Xelga [282]3 years ago
3 0

You have not given us any of the steps that Ricardo took to simplify the
expression, and you also haven't given us the list of choices that includes
the description of his mistake, so you're batting O for two so far. 
Other than those minor details, the question is intriguing, and it certainly
draws me in.

If Ricardo made a mistake in simplifying that expression, I'm going to say that
it was most likely in the process of removing the parentheses in the middle. 

Now you understand that this is all guess-work, because of all the stuff that you
left out when you copied the question, but I think he probably forgot that the  3x 
operates on everything inside the parentheses.

He probably wrote that  3x (x-3)  is

either    3x² - 3
     or       x - 9x .

In reality, when properly simplified,

       3x (x - 3)  =  3x² - 9x .


You might be interested in
Write the equation that relates the number of miles run (y) to the number of practices attended (x). Answer format: y=kx
Tems11 [23]

Answer:

y=3xStep-by-step explanation:

8 0
4 years ago
Karen is starting a career as a professional wildlife photographer and plans to photograph Canadian Geese at one of the staging
balandron [24]

Answer:

$5000*0.816 = $4082

Step-by-step explanation:

It's a strange question, but based on the statement and the question it sounds like it's a poisson distribution:

* For 3 days she was able to get 2 good shots (<em>typical of that time of the year</em>)

* Good shots happen randomly

* Each day is independent of another

Let's call 'p' the probability that she makes a good shot per day

Let's call 'n' the number of days Karen is taking shots.

So, if in 3 days he got 2 good shots and that is typical at that time of the year, then the expected value for the number of good shots (X) is:

E(x)=\frac{2}{3}

For a Poisson distribution E (x)=\lambda\\\lambda= np

So:

\lambda =\frac{2}{3}

For a Poisson distribution the standard deviation is:

\sigma = \sqrt{\lambda}\\\sigma = \sqrt{\frac{2}{3}}

\sigma = 0.816 this is the standard deviation for the number of buentas taken.

So the standard deviation for income is the price of each shot per sigma

$5000*0.816 = $4082, which is the desired response.

3 0
3 years ago
What is -5(-2) equal to
PtichkaEL [24]

Step-by-step explanation:

10

I think this should be the answer

3 0
3 years ago
Read 2 more answers
Kakegurui Masho! :')
Sindrei [870]

Answer:

EEEEEEEEEEEE

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
The time t required to drive a certain distance varies inversely with the speed r. If it takes 2 hours to drive the distance at
SVETLANKA909090 [29]
3 hours and 20 minutes
6 0
3 years ago
Other questions:
  • Find the distance between A (-3, -2) and B(-11, – 17).
    15·1 answer
  • Explain how to write fractions that represent visual models. Use your answers from Parts 1 and 2 as a guide.
    15·1 answer
  • You are preparing for a breakfast party and need enough milk for 20 people. Each person will drink about 200 milliliters of milk
    12·1 answer
  • Is every equilateral triangle cute
    5·2 answers
  • Erica solved the equation −5x − 25 = 78; her work is shown below. Identify the error and where it was made. (5 points) −5x − 25
    5·1 answer
  • The speed with which utility companies can resolve problems is very important. GTC, Georgetown Telephone Company, reports it can
    7·1 answer
  • What is the slope of the line shown below? (enter your answer as a decimal if necessary.)
    12·2 answers
  • I NEED HELP PLEASE I DONT UNDERSTAND AND CANT FAIL
    15·2 answers
  • Find the hcf by long division method 434 ,775​
    7·1 answer
  • 67 POINTS!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!