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
belka [17]
3 years ago
10

HELPPP!!!!!

Mathematics
2 answers:
garik1379 [7]3 years ago
7 0

Answer:

Nicole is correct, since when she multiplied by 3, she cleared the x's, since one x was already negative, and the other one was positive. Michael is incorrect since when he multiplied by 2, he didn't realize that both y's were positive, so they didn't clear.

Step-by-step explanation:

Let's see what will happen if we do what Nicole says:

x+2y=7

-3x+4y=9

multiply the first equation by 3 on both sides

3(x+2y)=7(3)

3x+6y=21

-3x+4y=9

now let's add them.

10y=30

We can see that the x's are cleared, since one x is positive and the other is negative.

Now let's try what Michael says.

x+2y=7

-3x+4y=9

multiply first equation by 2

2(x+2y)=7

2x+4y=7

-3x+4y=9

now let's add

-x+8y=16

the y's aren't eliminated, since both of them are positive.

Nicole is correct, since one x is positive and another was negative, and when opposite numbers are added together, they  cancel out and equal zero.

Hope this helps!

Kaylis [27]3 years ago
5 0

Answer:

Nicole is correct

Step-by-step explanation:

by multiplying the first equation by 3 it becomes:

3x + 6y =21

this can cancel the -3x in the second equation when adding them together

You might be interested in
wo lengths of a triangle are shown. wo lengths of a triangle are shown. Triangle J K L. Side J K is 5 inches and side J L is 10
Mazyrski [523]

Answer:

The correct answer is 9 inches : )

Step-by-step explanation:

I took the test and got it right

4 0
3 years ago
Read 2 more answers
Plzzzzzzz help pppppppp
Pepsi [2]

Answer:

c

A

D

Step-by-step explanation:

i hope this helps

4 0
3 years ago
Write the fraction in simplest from 8/10
AleksandrR [38]

Divide common factors from both numerator and denominator.

Divide 2

8/2 = 4

10/2 = 5

8/10 simplified = 4/5

hope this helps

7 0
3 years ago
Read 2 more answers
0.48 divided by 0.06 with shown work please help!
Valentin [98]

Answer: 8

Step-by-step explanation:

2 To convert to a percent, multiply the decimal by 100.

8\times 100=800

8×100=800

800

800%

6 0
3 years ago
So, I believe the answer here would tan y but could it possibly be sin y?
nadezda [96]

sorry it took me so long to answer this!!

Yes, the answer would be tan y.

4 0
3 years ago
Other questions:
  • <img src="https://tex.z-dn.net/?f=%28y%20-%201%29%20%5E%7B2%7D%20" id="TexFormula1" title="(y - 1) ^{2} " alt="(y - 1) ^{2} " al
    9·1 answer
  • 4. A book club earns $230 for its meetings. They want to divide the money to pay for 7 meetings. When the treasurer types
    7·1 answer
  • When is the substitution method a better method than graphing for solving a system of linear equations?
    13·1 answer
  • 5x +9x if x=3 solve please
    11·2 answers
  • Which linear inequality is represented by the graph
    8·1 answer
  • Please someone help me!!! ASAP
    14·2 answers
  • Solve for x. Enter the solutions from least to greatest. Round to two decimal places. (x+7)^2 - 11 = 0
    12·1 answer
  • I need help aaaaaaaaa
    12·2 answers
  • Please answer number 15 I’ll give brainliest thanks!
    7·1 answer
  • christine must choose a shirt a pair of pants and a cap for todays outfit she has 2 shirts, 5 pairs of pants and 1 cap to choose
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!