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
irina1246 [14]
3 years ago
6

- 2x + 5y = -15 How many solutions does the system have? V exactly one The solution to the system is 5x + 2y = -6 How could you

solve this system using elimination? Check all that apply. * Multiply the first equation by 2 and the second equation by 5, then add. Multiply the first equation by 5 and the second equation by 2. Then add. Multiply the first equation by 2 and the second equation by 5, then subtract. Multiply the first equation by 5 and the second equation by 2, then subtract.
Mathematics
2 answers:
goblinko [34]3 years ago
5 0

Answer:

Multiply the first equation by 5 and the second equation by 2. Then add.

Multiply the first equation by 2 and the second equation by 5, then subtract.

Step-by-step explanation:

Given

- 2x + 5y = -15

5x + 2y = -6

Required

Steps to solve using elimination method

<em>From the list of given options, option 2 and 3 are correct</em>

<em>This is shown below</em>

Option 2

Multiply the first equation by 5

5(- 2x + 5y = -15)

-10x + 25y = -75

Multiply the second equation by 2.

2(5x + 2y = -6)

10x + 4y = -12

Add

(-10x + 25y = -75) + (10x + 4y = -12)

-10x + 10x + 25y +4y = -75 - 12

29y = -87

Notice that x has been eliminated

Option 3

Multiply the first equation by 2

2(- 2x + 5y = -15)

-4x + 10y = -30

Multiply the second equation by 5

5(5x + 2y = -6)

25x + 10y = -30

Subtract.

(-4x + 10y = -30) - (25x + 10y = -30)

-4x  + 25x + 10y - 10y= -30 +30

21x = 0

<em>Notice that y has been eliminated</em>

Irina-Kira [14]3 years ago
3 0

Answer:

How many solutions does the system have?

✔ exactly one

The solution to the system is

(

⇒ 0,

⇒ -3).

Step-by-step explanation:

the next two parts

You might be interested in
PLZZPLZZ ANSWERALL THE QUESTIONS I CANT CELEBRATE CHRISTMAS IF I DONT FINISH PLZ HELP PLZZ LOOK AT THE PIC plzz
Harlamova29_29 [7]

Answer:

17: Slope = -5

18: = 1/3

19: = -1/5

20: = Does not exist

21: = 1/4

22: =-2/3

Step-by-step explanation:

Please follow and mark me braibliest

happy Christmas

5 0
3 years ago
Convert 356.50 base 10 to hexadecimal​
kherson [118]

Answer:

164.8

Step-by-step explanation:

I used a calculator :)

5 0
3 years ago
42 ÷ 7 = help me i need to finish in 2 min
victus00 [196]

Answer:

6

Step-by-step explanation:

6 X 7 = 42

7 0
4 years ago
Read 2 more answers
A store owner wants to know how many of her 600 regular customers prefer canned vegetables. Each of her three cashiers randomly
d1i1m1o1n [39]

Answer:

Sample A Estimate: 330

Sample B Estimate: 420

Sample C Estimate: 360

Median: 360

Range: 90

Step-by-step explanation:

For the sample estimate, multiply 600 by 11/20, 7/10, and 3/5 in order.

600 * 11/20

6600/20

330 people for Estimate A.

600 * 7/10

420/10

420 people for Estimate B.

600 * 3/5

1800/5

360 people for Estimate C.

330, 360, 420

360 is the median of these estimates.

420 - 330 = 90

90 is the range of these estimates.

5 0
3 years ago
I NEED HELP PLEASE SOMEONE HELP ME
sasho [114]

Answer:

2nd option is the correct answer

Step-by-step explanation:

3 times a number decreased by 6 is - 2

4 0
3 years ago
Other questions:
  • You've got 60 homework problems to do and it took you 10 minutes to do eight of them. At that rate, how long will it take?
    13·2 answers
  • Help with this question !!!
    7·1 answer
  • Solve.<br> 1.3(5v) = v + 11
    5·1 answer
  • Solve proportion 7x/5=42/3
    12·1 answer
  • 8. Which equation best represents the line
    8·1 answer
  • Write “2/3x-1/3y=2” in standard form
    6·1 answer
  • Landon is building new bookshelves for his bookstore's new mystery section. Each shelf can hold 37 books. There are 1,406 myster
    7·1 answer
  • 96r - 84 = 120<br> PLEASE HELP
    15·2 answers
  • Max earns $6.50 per hour mowing lawns. On Saturday he earned $52. How many hours did he mow lawns?
    6·2 answers
  • Which of the following statements is true? ​
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!