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
Anuta_ua [19.1K]
3 years ago
9

Which is equivalent to the following expression (3m^2+2mn-n^2)+(m^2+4mn-n^2)

Mathematics
1 answer:
olga2289 [7]3 years ago
4 0

Answer:

<h3>4m² + 6mn - 2n²</h3>

Step-by-step explanation:

(3m^2+2mn-n^2)+(m^2+4mn-n^2)\\\\=3m^2+2mn-n^2+m^2+4mn-n^2\qquad\text{combine like terms}\\\\=(3m^2+m^2)+(2mn+4mn)+(-n^2-n^2)\\\\=\boxed{4m^2+6mn-2n^2}

You might be interested in
N is an integer chosen at random from the set {5, 7, 9, 11 } p is chosen at random from the set {2, 6, 10, 14, 18} What is the p
belka [17]
Answer:   A) 0.1 

Explanation:
<span>Each of the integers in the first set could be combined with any from the second set, giving a total of 4 x 5 = 20 possible pairs.Of these the combinations that could give a sum of 23 are (5 + 18), and (9 + 14)<span>This means that the probability of getting a sum of 23 is 2/20 = 1/10</span></span>
6 0
3 years ago
Plz help ill give u brainlist
PSYCHO15rus [73]
Hello!

It tells you what to do in the question

First round all the numbers to the nearest whole number

2.20 = 2
2.34 = 2
2.7 = 3

Then it says to multiply all the numbers

2 * 2 * 3 = 12

Then it says to divide by 6

12 /  6 = 2

The answer is 2 cubic yards

Hope this helps!
5 0
3 years ago
Read 2 more answers
A weir is used to measure water flow in a channel. For a rectangular broad crested weir, the flow Q in cubic feet per second is
NikAS [45]

Answer:Find the water height for a weir that is 3 feet long and has flow of 38.4 cubic feet per second. SOLUTION: Therefore, the water height for the weir is 4 feet.

6 0
3 years ago
Read 2 more answers
In a game, Janeesa started with 0 points. She then earned 50 points, lost 80 points and earned 10 points. Which number line show
umka2103 [35]

Answer:

-20

Step-by-step explanation:

If Jeneesa started with, 0 points and she earned 50, then she would have 50. If she lost 80 points, she would go into the negatives. She would be at -30, and when she earned 10 more points, she would be at -20.

I don't know what your options look like, but look at the one(s) with -20 at the end and figure out what one best fits my explanation (and the numbers I use)!

3 0
3 years ago
The function ƒ(x) = 6x is vertically shrunk by a factor of ½ and translated 9 units in the negative y- direction. Select the cor
vlada-n [284]

Answer:

A

Step-by-step explanation:

3 0
3 years ago
Other questions:
  • All of the following are ways to write 25 percent of n except
    7·2 answers
  • Jose Is planning an end of the year swimming party for some of his friends he wants to make gift bags for each of them I he has
    9·1 answer
  • A) 18 is 25% of what<br><br> B) What percent of 40 is 22
    5·1 answer
  • If you help me with all those questions i swear i’ll give you an extra 60 points
    11·1 answer
  • Write an expression that is equivalent to 5(3x plus 2z)
    15·1 answer
  • Find an equation that is equivalent to 2x+3y=6 in polar cordintates
    8·1 answer
  • Rosa has $175 in her online music account. Each month she buys $15 worth of new songs. Which inequality could be solved
    14·1 answer
  • HELP ME PLEASE IF YOU SEE THIS PLEASE HELP I ONLY NEED THE ANSWER YOU DONT EVEN HAVE TO EXPLAIN IT
    12·2 answers
  • a. If Mei has already earned 30 points, write and solve an addition equation to find the number of points she still needs.​
    10·1 answer
  • Kenji had 1/4 of a pizza left over. He ate 1/2 of the leftovers. How much of a pizza did he eat?
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!