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
Aleksandr [31]
3 years ago
7

Solve using the substitution method:y = -2x - 7y = 3x + 3​

Mathematics
1 answer:
levacccp [35]3 years ago
4 0
Substitute
So, -2x-7 = 3x + 3
+2x. +2x
-7= 5x +3
-5x. -5x

-5x-7= 3
+7. +7
-5x= 10

Divide -5 on both sides and you get x= -2

Then substitute -2 in the first equation

-2(-2)-7
4-7
Y= -3
You might be interested in
What number does x stand for in this equation?<br> -7X + 6= 27
Levart [38]

Answer:

x = -3

Step-by-step explanation:

-7X + 6= 27

Subtract 6 from each side

-7x +6-6 = 27 -6

-7x = 21

divide each side by -7

-7x/-7 = 21/-7

x = -3

5 0
4 years ago
What is the solution to the equation<br> 1/2x+3 = 2/3+1?
Alex

Answer:

x = -8/3

Step-by-step explanation:

1/2x+3 = 2/3+1

Combine like terms

1/2x+3 = 2/3 + 3/3

1/2x + 3 = 5/3

Subtract 3 from each side

1/2x + 3-3 = 5/3 - 3

1/2x = 5/3 - 9/3

1/2x = -4/3

Multiply each side by 2

1/2x *2 = -4/3*2

x = -8/3

7 0
3 years ago
During a concert, $3280 was received. A total of 760 people attended. Reserved seats were $6 and general admission seats were $4
Andre45 [30]

Answer:

The number of reserved seat is 120 and number of general seat is 640.

Step-by-step explanation:

Given,

Total number of seats = 760

Total collected Money = $3280

Solution,

Let the total number of reserved seat be x.

And  the total number of general seat be y

Hence total number of seats is the sum of total number of reserved seat and  the total number of general seats.

So the equation can be written as;

x+y=760\ \ \ \ equation\ 1

Again, total money collected is the sum of fees of one reserved seat times total number of reserved seat and fees of one general seat times the total number of general seats.

So the equation can be written as;

6x+4y=3280\ \ \ \ \ equation\ 2

Now, multiplying equation 1 by 4 and then subtract it from equation 2.

4x+4y=3040

(6x+4y)-(4x+4y)=3280-3040\\\\2x=240\\\\x=\frac{240}{2}=120

On substituting the value of x in equation 1, we get;

x+y=760\\120+y=760\\y=760-120=640

Thus the number of reserved seat is 120 and number of general seat is 640.

8 0
3 years ago
Determine whether each ordered pair is a solution to the inequality x+y&lt;−1.
leva [86]

Answer:

no

Step-by-step explanation:

coordinates pair (2,11) does not go with the inequality

6 0
3 years ago
A robot that makes _/8 of a boat per day will make 7 boats in 8 days
Sidana [21]
7/8 boats per day will make it
8 0
3 years ago
Other questions:
  • Carol wanted to see how the data would change if she did not include the outlier in her study. The results are shown in the tabl
    7·2 answers
  • 104/96 as a mixed fraction
    12·1 answer
  • Which statement best describes a scientific theory? A. an educated guess B. a statement of pure fact C. a general principle base
    7·1 answer
  • Jeremy walked 6/8 of the way to school and ran the rest of the way. What fraction, in simplest form, shows the part of the way t
    6·1 answer
  • I need all the answers asp please
    11·1 answer
  • The laws that established an official system of slavery in the American colonies
    11·1 answer
  • Can someone please help me with this?!??!??!!???
    10·1 answer
  • A lawn-care company loses $130 as a result of a delay. The 4 owners of the company must share the loss equally. Which expression
    8·1 answer
  • DE is a Mid-segment of triangle ABC. How long is DE?
    11·1 answer
  • How do u calculate Pythagorean theorem and what is the formula
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!