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
algol [13]
4 years ago
5

Marcus finds that (3x^2-2y^2+5x)+(4x^2+12y-7x)= 7x^2-10y^2-2x What error did Marcus make?

Mathematics
2 answers:
Yuri [45]4 years ago
8 0

we have

(3x^{2} -2y^{2}+5x)+(4 x^{2}+12y^{2}-7x)

Combine like terms

(3x^{2} -2y^{2}+5x)+(4 x^{2}+12y^{2}-7x)\\=(3x^{2}+4x^{2})+(-2y^{2}+12y^{2})+(5x-7x)\\=7x^{2} +10y^{2}-2x

therefore

<u>the answer is the option C</u>

He combined the terms -2y^{2} and 12y^{2} incorrectly

Juli2301 [7.4K]4 years ago
4 0
I believe the correct answer from the choices listed above is option C. The error that Marcus made would be that he <span>combined the terms –2y^2 and 12y^2 incorrectly. It should be 10y^2 when combined not -10y^2. Hope this answers the question.</span>
You might be interested in
Which letter has neither line symmetry nor rotational symmetry?
Inga [223]
FGJLPQR Are some letters with no rotational or line symmetry
4 0
3 years ago
Read 2 more answers
A 7000.00 principal is invested in 2 accounts, 1 earning 3%interest the other 7% interest with the total interest for the year 2
MakcuM [25]

Answer:

The amount in the first account is $5,700

The amount in the second account is $1,300

Step-by-step explanation:

Let the mount invested in the first account be x and the one invested in the second account be y.

Then the total principal is x+y=7000---->(1)

The interest in the first account is .03*x

The interest in the first account is .07*y

The total interest for the year  is 262.00.

This implies that:

0.03x+0.07y=262---->(2)

We solve the two equations simultaneously to get:

x=5,700 and y=1,300

7 0
3 years ago
a librarian is interested in how many books an average visitor checks out. she keeps a tally of how many books are checked out b
defon
The answer is convenience sample
6 0
3 years ago
The least common multiple of the numbers 15, 12, 8
Ymorist [56]

Answer: LCM of 8, 12, and 15 is 120.

Step-by-step explanation:

I hope this helps!

6 0
3 years ago
Read 2 more answers
Which number is NOT in the solution set of x − 9 &gt; 3?<br> A) 11 <br> B) 13 <br> C) 15 <br> D) 17
densk [106]

Answer:

A

Step-by-step explanation:

Given

x - 9 > 3 ( add 9 to both sides )

x > 12

13, 15 and 17 are all greater than 12

However, 11 is less than 12 and is not in the solution set → A

7 0
3 years ago
Read 2 more answers
Other questions:
  • An equiangular triangle can be a scalene?
    11·1 answer
  • Alyssa wants to know the gas mileage of her new car. She kept track of the number of miles she traveled and the number of gallon
    9·1 answer
  • Please someone help me with these questions. will give you brainliest.
    13·1 answer
  • Alisa says it is easier to compare numbers is set A (45,760/ 1025680) than set B (492,111/ 409,867.
    6·1 answer
  • Add 20 7/12 + 4 2/10
    14·1 answer
  • Which expression shows another way to write 36+16?<br> 419) + 4<br> 4(9+4)<br> 6(6+8)<br> (6+4)(6+4)
    9·1 answer
  • Real word example where a<br> piecework function might be used
    12·1 answer
  • A trainer uses 0.75 roll of medical tape on each soccer player. If there are 15 players on the team and 80% get taped up, how ma
    5·2 answers
  • For what value of m is 56m∙(569)256−7equivalent to 5614?
    13·1 answer
  • 5/6 divided by [13/11]
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!