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
iragen [17]
3 years ago
8

Solve for the elimination 2x-9y=23 -4x-4y=20

Mathematics
2 answers:
AnnZ [28]3 years ago
8 0
(2x-9y=23) (2) Multiply by 2 -4x-4(-3)=20. Put -3 where "x" belongs Y= -3, x= -2
-4x-4y=20. -4x+12=20.
+4x-18y=46. Add -12 -12. Subtract 12 on both sides
__________. __________
-22y=66. -4x=8
_______. _____
-22 -22. Divide by -22 -4. -4. Divide by -4
________. = x=-2
Y= -3
Nataly [62]3 years ago
7 0
Y is equal to -3 
and x is equal to -2
You might be interested in
Which land forms are formed by wind deposition in the desert region?​
Elena L [17]

Answer:

Sand Dune Landforms

Sand dunes (both active and stabilized by vegetation) can be found along beaches, and in arid or semi-arid regions. Dunes are mounds of loose sand created by wind and are the most well known aeolian features

8 0
3 years ago
Read 2 more answers
Let f(x) = 7^x and g(x) = 7^x+2 - 4 which transformations are needed to strand form the graph of f(x) to the graph of g(x)?
serg [7]

Answer:

options 3 and 6

Step-by-step explanation:

the exponent x+2 means that the graph moves to the left 2 units and the value of K, which is -4, means that the graph will then move down 4 units from the parent function f(x)

6 0
3 years ago
Prove that:
devlian [24]

Answer:

<u>Identities used:</u>

  • <em>1/cosθ = secθ</em>
  • <em>1/sinθ = cosecθ</em>
  • <em>sinθ/cosθ = tanθ</em>
  • <em>cosθ/sinθ = cotθ</em>
  • <em>sin²θ + cos²θ = 1</em>
<h3>Question 1 </h3>
  • (1 - sinθ)/(1 + sinθ) =        
  • (1 - sinθ)(1 - sinθ) / (1 - sinθ)(1 + sinθ) =
  • (1 - sinθ)² / (1 - sin²θ) =
  • (1 - sinθ)² / cos²θ

<u>Square root of it is:</u>

  • (1 - sinθ)/ cosθ =
  • 1/cosθ - sinθ / cosθ =
  • secθ - tanθ
<h3>Question 2 </h3>

<u>The first part without root:</u>

  • (1 + cosθ) / (1 - cosθ) =
  • (1 + cosθ)(1 + cosθ) / (1 - cosθ)(1 + cosθ)
  • (1 + cosθ)² / (1 - cos²θ) =
  • (1 + cosθ)² / sin²θ

<u>Its square root is:</u>

  • (1 + cosθ) / sinθ =
  • 1/sinθ + cosθ/sinθ =
  • cosecθ + cotθ

<u>The second part without root:</u>

  • (1 - cosθ) / (1 + cosθ) =
  • (1 - cosθ)²/ (1 + cosθ)(1 - cosθ) =
  • (1 - cosθ)²/ (1 - cos²θ) =
  • (1 - cosθ)²/sin²θ

<u>Its square root is:</u>

  • (1 - cosθ) / sinθ =
  • 1/sinθ - cosθ / sinθ =
  • cosecθ - cotθ

<u>Sum of the results:</u>

  • cosecθ + cotθ + cosecθ - cotθ =
  • 2cosecθ
4 0
3 years ago
Read 2 more answers
Remember to eat and drink water. Have an amazing day, I love you!
AveGali [126]

Answer:

Nice picture

Step-by-step explanation:

utoo............

5 0
3 years ago
Read 2 more answers
Help please I’m struggling badly because Im bad at math
myrzilka [38]

Answer:

40º

Step-by-step explanation:

if u look at the triangle it would show you

5 0
3 years ago
Read 2 more answers
Other questions:
  • A Table showing Freezing Temperatures in degrees with 2 columns and 6 rows. The First row, F, has the entries, negative 13, nega
    15·2 answers
  • The answer please and thank you
    11·1 answer
  • What is 30% as a fraction
    13·1 answer
  • Determine a medida do ângulo indicado 14x-3=13x+1
    15·1 answer
  • Please help whit ratio
    13·2 answers
  • you want to make a playlist with your top 12 favorite songs. in how many different ways can the playlist be made. order matters
    13·2 answers
  • I need help on this one ?
    5·1 answer
  • Two angles in a triangle measure 102 and 54. What measure of the third angle?
    5·1 answer
  • Mrs. Silva is taking her family to Arctic Dome ice rink. The employee she spoke to on the phone said the total cost for all 5 of
    7·1 answer
  • What is the slope if the line is differeniable.
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!