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
r-ruslan [8.4K]
3 years ago
14

Which statement shows how two polynomials 4x2 and x2 + 3x + 7 demonstrate the closure property when multiplied?

Mathematics
1 answer:
son4ous [18]3 years ago
4 0
By definition we have to:
 A set has under an operation if performance of that operation on set members always produces a member of the same set; in this case we also say that the set is closed under the operation.
 For this case we have the following polynomials:
 4x ^ 2

x ^ 2 + 3x + 7
 Multiplying we have:
 (4x ^ 2) (x ^ 2 + 3x + 7) = 4x ^ 4 + 12x ^ 3 + 28x ^ 2

 The product of two polynomials is also a polynomial.
 Answer:
 
d 4x ^ 4 + 12x ^ 3 + 28x ^ 2 is a polynomial
You might be interested in
A circle has its center at the center of a square with 3-inch sides. Find the area of the square not covered by the circle Round
Aleonysh [2.5K]
So in order for us to know the area of the square that is not covered by the circle, we need to find first both the areas of the square and the circle.
So for the area of the square it is A = sxs. And for the circle is A = pi*r^2.
Let us find the area of the square first given that the side is 3 inches.
So A = 3*3
    A = 9 square inches.
Next is the area of the circle. Since the center of the circle is the same with the center of the square, the radius would be 1.5.
SO, A = (3.14)(1.5)^2
       A = 2.25 (3.14)
        A = 7.065 square inches.
Next, we deduct the area of circle from area of square and the result would be 1.935 <span>in². So the answer for this would be option B.
Hope this answer helps.</span>
7 0
3 years ago
Julia is opening a clothing store. She plans to start by selling sweatshirts. if it costs her $9.50 for each sweatshirt, $5 for
Lilit [14]
B is definatly the correct answer, Add all of the prices, and that is what it costs per sweatshirt
7 0
3 years ago
For bone density scores that are normally distributed with a mean of 0 and a standard deviation of​ 1, find the percentage of sc
mr Goodwill [35]
<span>In a normal distribution 68.27% of the values are within one standard deviation from the mean, 95.5% of the values are within two standard deviations from the mean, and 99.7 % of the values are within three standard deviations of the mean

With that you have the answer to the three questions:

</span>
<span>a. significantly high​ (or at least 2 standard deviations above the​ mean).

99.5% of the values are within 2 standard deviations from the mean, half of 100% - 95.5% = 4.5% / 2 = 2.25% are above the mean, so the answer is 2.25%

b. significantly low​ (or at least 2 standard deviations below the​ mean).

The other half are below 2 standard deviations, so the answer is 2.25%

c. not significant​ (or less than 2 standard deviations away from the​ mean).

As said, 95.5% are within the band of two standard deviations from the mean, so the answer is 95.5%.
</span>
7 0
3 years ago
Read 2 more answers
The scale factor of the scale drawing of a mirror to the actual mirror is represented by the ratio 1 : 8 . If the dimensions of
Lubov Fominskaja [6]

Answer: 204 square inches

Step-by-step explanation: I’m not really sure, but if you follow through with the normal area identifying method; Length x Width, you should come up with 25.5. After doing this, you could multiply your product by 8 because your actual mirror size is 8 times greater. You will come up with 204 square inches, which would be your final solution. (Once again, I am not sure, just doing how I’ve been understanding from studies).

8 0
3 years ago
B. There are 270 deer on a reservation. The deer population is decreasing at a rate of 3.2% per year.
Naddika [18.5K]

Answer:

i need points sorry

Step-by-step explanation:

7 0
3 years ago
Other questions:
  • A trumpet has a length of 140cm. The first valve lowers the root note by two semitones (f1/f0 = 2-2/12) and the second valve low
    7·1 answer
  • Simplify the expression
    15·1 answer
  • In Detroit the high temperature in degrees Fahrenheit for five days in January were -12 , -8 , -3 , 6 , -15. What was the averag
    13·2 answers
  • PLEASE HELP, WILL GIVE BRAINLIEST.
    12·2 answers
  • Please help! This is due tomorrow. ;c
    13·1 answer
  • Evelina took 50 people fishing each day last week. The table shows the number of fish the group caught each day.
    11·1 answer
  • Passes through (0, 1) and (2, 5)
    11·1 answer
  • Which number is irrational? Is 2 correct? And please help on 3 I don’t understand this :(
    15·2 answers
  • What fraction and whole number does the model represent
    13·1 answer
  • Please help it an emergency and I give Brainiest.
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!