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
Elena-2011 [213]
2 years ago
12

Solve the system of equations x - y = 12 and x + 7y = -20 by combining the equations.

Mathematics
2 answers:
svetoff [14.1K]2 years ago
8 0

Answer:

x= 8, y= -4

Step-by-step explanation:

You can subtract one equation by another to eliminate x

(x-y)-(x+7y)=12-(-20)

-8y = 32

y= -4

Substitute y =  -4 in the first equation:

x-(-4) = 12

x =8

iogann1982 [59]2 years ago
7 0

Answer:

x=16, y=-4

Step-by-step explanation:

-1(x-y=12)

x+7y=-20

-x+y=-12

x+7y=-20

8y=-32

y=-4

x-4=12

x=16

You might be interested in
Find the value of x. Round your answer to the nearest tenth.
Crazy boy [7]
<h2>The value of x "option A) 12.5" is required answer.</h2>

Step-by-step explanation:

In given figure,

Base (b) = 11 and Angle = 28°

To find, the value of x = ?

We know that,

\cos A=\dfrac{b}{h}

Where, h is the hypotaneous = x

⇒ \cos 28=\dfrac{11}{x}

⇒ x=\dfrac{11}{\cos 28}

The value of \cos 28 = 0.8829

⇒ x = \dfrac{11}{0.8829}

⇒ x = 12.458

⇒ x ≈ 12.5

∴ The value of x ≈ 12.5

Thus, the value of x "option A) 12.5" is required answer.

7 0
3 years ago
Circumference (rounding)
KonstantinChe [14]

Answer:

41

Step-by-step explanation:

13 cm × 3.14 ( pi )

will give you

40.82 = 41

3 0
2 years ago
Read 2 more answers
Dwayne needs 1 2/3cups of shredded cheese to put in
Y_Kistochka [10]

Answer:

7/12 please give brainliest.

Step-by-step explanation:

5 0
2 years ago
Jeff writes comic strips for local newspaper. The number of comic strips he created is represented by the function f(x)=3x, wher
grin007 [14]
If Jeff writes comic strips at a rate of 3 comics an hour then you must put 3,4,7&9 into the function and add up the products.
9+12+21+27=69
5 0
2 years ago
How far is 75% of a 2000 km trip
11Alexandr11 [23.1K]
2000 * 0.75 = 1,500 km
4 0
2 years ago
Read 2 more answers
Other questions:
  • Simplify the algebraic expression -2(x - 3) + 4(-2 x + 8) *
    6·2 answers
  • Math help please sighh &gt;.&lt; (4 options included)
    10·1 answer
  • craig scored 12 points in a game marla scored twice as many points as craig but 5 fewer points than nelson scored write an expre
    13·1 answer
  • Paige works at a department store and has a commission rate of 3 percent. Her sales for the quarter were $4,596. If she earns $5
    5·1 answer
  • Solve for all values of x by factoring
    5·1 answer
  • Helppp please thank you
    12·1 answer
  • Lee graphs the function y=2x2+1 y = 2 x 2 + 1 . Which statement explains whether the function is linear or not linear?
    7·1 answer
  • The sum of three whole numbers in 27. The mean of the three whole numbers is 9, and the greatest number is twice the least numbe
    8·2 answers
  • Your salary is $65,788. If you work fifty 40-hour weeks in a year, what is your hourly wage?
    14·1 answer
  • PLEASE HELP ME
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!