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
8_murik_8 [283]
2 years ago
7

Solve the system of equations 3x-4y=18 -2x-3y=5

Mathematics
2 answers:
oksian1 [2.3K]2 years ago
6 0
\left\{\begin{array}{ccc}3x-4y=18&/\cdot2\\-2x-3y=5&/\cdot3\end{array}\right\\\\+\left\{\begin{array}{ccc}6x-8y=36\\-6x-9y=15\end{array}\right\\-------------\\.\ \ \ \ \ \ \ -17y=51\ \ \ \ |:(-17)\\.\ \ \ \ \ \ \ \ \ y=-3\\\\3x-4(-3)=18\\3x+12=18\\3x=18-12\\3x=6\ \ \ \ |:3\\x=2\\\\Answer:x=2\ and\ y=-3\to(2;-3)

Dmitry [639]2 years ago
5 0
\left \{ {\big{ 3x-4y=18\ /\cdot2} \atop\big {-2x-3y=5\ /\cdot3}} \right.\\\\  \left \{ {\big{ 6x-8y=36} \atop\big {-6x-9y=15}} \right.\\---------\\-17y=51\ /:(-17)\\.\ \ \ \ \ \ y=-3\\\\3x-4y=18\\\Rightarrow\ \ 3x-4\cdot(-3)=18\ \ \ \Rightarrow\ \ 3x+12=18\ \ \ \Rightarrow\ \ 3x=6\ \ \ \Rightarrow\ \ x=2\\\\ \left \{ {\big{ x=2\ \ \ } \atop\big {y=-3}} \right.
You might be interested in
I need help fast i will give out brinalist
Irina-Kira [14]
D. Tanisha is 6, and Bess is 12
7 0
3 years ago
Read 2 more answers
104x1033..........................and also should i quit fortnite?
Dimas [21]

Answer:

yes you should its a waste of time and money

6 0
3 years ago
Read 2 more answers
A pendulum is 18 feet long. Its central angle is 44º. The pendulum makes one back and forth swing every 12 seconds. Each minute,
expeople1 [14]
Radius: r=18 feet
Cental Angle: A=44°
Each cycle (one back and forth) lasts 12 seconds
In each cycle the pendulum swings:
L=(A/360°) 2 pi r
L=(44°/360°)(2)(3.141592654)(18 feet)
L=(0.122222222)(113.0973355 feet)
L=13.82300764 feet
Rounded to 3 decimal places:
L=13.823 feet

Each minute (60 seconds) the pendulum makes:
Number of cycles: n=(60 seconds) / (12 seconds)→n=5 cycles

Then, each minute, the pendulum swings:
T=nL=5(13.823 feet)→T=69.115 feet

Answer: Each minute, the pendulum swings 69.115 feet. 
8 0
3 years ago
What is the period of the function y=3/2con(3/5x)+5
jeyben [28]

Answer:

y =  \frac{3}{2} cot( \frac{3x}{5} ) + 5 \\  \\  \pi \div \frac{3}{5} \\  \  \\  =  \frac{5\pi}{3} is \: period

6 0
2 years ago
X
galina1969 [7]

Answer:

2 angles that meet at an endpoint

8 0
2 years ago
Other questions:
  • How do I solve fro r and q?<br><br> 9r+q=13<br> 3r+2q=-4
    8·2 answers
  • Explain how you know twenty one hundredths is greather than one fifth
    15·2 answers
  • What is the answer? PLZ HELP
    14·2 answers
  • Whats the vertex y=4x^2+16x+7
    9·1 answer
  • Type the correct answer in the box.
    12·1 answer
  • Please help please help please help please help please help please help please help please help
    15·1 answer
  • Please do this quickly. Question is in the picture
    9·1 answer
  • Help&amp;EXPLAIN <br><br> Don’t use for points <br> I’ll report
    7·2 answers
  • X is an integer.
    15·1 answer
  • Celia can make one batch of lemonade using 2 cups of lemon juice and 3 cups of water. In the space below, show or explain how sh
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!