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
asambeis [7]
3 years ago
10

-4x - 28y=56 4x + 14y=-28

Mathematics
1 answer:
ddd [48]3 years ago
4 0
Adding the 2 equations will eliminate x because -4x + 4x = 0
so we get
-14y = 28
y = -2
plug this into the second euqtion:-
4x + 14(-2) = -28
4x  - 28 = -28 
x = 0

answer is x = 0 , y = -2
You might be interested in
Tell whether x and y show direct variation. x + y = 6​
Over [174]
<h3>Answer: Not direct variation</h3>

The reason why is because it can't be written in the form y = kx

If we solved the given equation for y, we get y = -x+6. It has a y intercept of 6, but it should be zero if we wanted a direct variation equation.

5 0
2 years ago
HELP I NEED HELP ASAP
Nady [450]

Answer:

A

Step-by-step explanation:

because the -2 is where the point is and the slope will start there so when you draw a line the line will pass by (0,-2)

5 0
2 years ago
Simplify the expression using trigonometric identities: sec (–θ) – cos θ.
ololo11 [35]

Answer:

sin θ . tan θ

Step-by-step explanation:

Note : -

sec ( - θ ) = sec θ

Formula / Identity : -

sec θ = 1 / cos θ

sec ( - θ ) - cos θ

= [ 1 / cos θ ] - cos θ

{ LCM = cos θ }

= [ 1 / cos θ ] - [ cos²θ / cos θ ]

= [ 1 - cos²θ ] / cos θ

{ 1 - cos²θ = sin²θ }

= sin²θ / cos θ

{ sin²θ = sin θ . sin θ }

= sin θ . sin θ / cos θ

{ sin θ / cos θ = tan θ }

= sin θ . tan θ

Hence, simplified.

4 0
2 years ago
Please help!!!!!!!!!!!! 8 and 9
irina1246 [14]

m<E=45.5 m<F=45.5

this is question 8 can't see question 9

6 0
3 years ago
How is 8/15 written as a mixed number?​
babymother [125]

Answer:

8/15 is already a proper fraction, therefore it cannot be converted to a mixed number. Hope this helps!

Step-by-step explanation:

7 0
2 years ago
Other questions:
  • 3x^2-28=2×^2+33 solving for x
    9·1 answer
  • What is the slope?
    5·1 answer
  • Please help! I don't get it! It is confusing me!
    11·2 answers
  • If r = 3 units and x = 11 units,then what is the volume of the cylinder?
    9·1 answer
  • Sales of a popular movie increased by 129% from the first week to the second week. If 2,456 movies were sold the first week, how
    7·1 answer
  • Ken finished one-half of his homework
    9·1 answer
  • At my favorite computer store, there was a sale of 20% off. I bought a $300
    6·1 answer
  • Keiko bought 2 CDs that were each the same price. Including sales tax,she paid a total of $34.20. Of that total, $1.80 was tax.
    12·1 answer
  • Simplify by combining like terms: 9x - 3y -5x + 2y -x + 2
    6·1 answer
  • Graph the equation on the coordinate plane. y=x-3 Select two points on the line to graph the line.​
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!